Method and apparatus for multiplexing higher-resolution channel state information (csi)

ABSTRACT

A method of user equipment (UE) for channel state information (CSI) is provided. The UE comprises receiving configuration information for K CSI reports, wherein the configuration information includes resource allocation information for an uplink control information (UCI) transmission that includes UCI comprising N UCI parts, calculating the K CSI reports and partitioning the K CSI reports into N parts, determining an available number of information bits (B1) for the UCI transmission according to the resource allocation information, determining a required number of information bits (B2) for the UCI transmission according to the calculated K CSI reports, determining whether the B2 exceeds the B1; and transmitting, to the BS over one slot of an uplink channel, a first part of the N UCI parts including a first of the N parts of the K CSI reports when the B2 exceeds the B1, wherein K and N are positive integers.

CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY

The present application claims priority to:

U.S. Provisional Patent Application Ser. No. 62/548,222, filed on Aug.21, 2017;

U.S. Provisional Patent Application Ser. No. 62/556,711, filed on Sep.11, 2017;

U.S. Provisional Patent Application Ser. No. 62/557,320, filed on Sep.12, 2017;

U.S. Provisional Patent Application Ser. No. 62/558,120, filed on Sep.13, 2017;

U.S. Provisional Patent Application Ser. No. 62/559,322, filed on Sep.15, 2017;

U.S. Provisional Patent Application Ser. No. 62/559,961, filed on Sep.18, 2017;

U.S. Provisional Patent Application Ser. No. 62/564,612, filed on Sep.28, 2017;

U.S. Provisional Patent Application Ser. No. 62/566,916, filed on Oct.2, 2017;

U.S. Provisional Patent Application Ser. No. 62/569,765, filed on Oct.9, 2017;

U.S. Provisional Patent Application Ser. No. 62/570,293, filed on Oct.10, 2017;

U.S. Provisional Patent Application Ser. No. 62/594,886, filed on Dec.5, 2017; and

U.S. Provisional Patent Application Ser. No. 62/609,931, filed on Dec.22, 2017;

The content of the above-identified patent documents is incorporatedherein by reference.

TECHNICAL FIELD

The present disclosure relates generally to wireless communicationsystems and, more specifically, to the multiplexing higher-resolutionchannel state information (CSI) in an advanced wireless communicationsystem.

BACKGROUND

Understanding and correctly estimating the channel in an advancewireless communication system between a user equipment (UE) and an eNodeB (eNB) is important for efficient and effective wireless communication.In order to correctly estimate the channel conditions, the UE may report(e.g., feedback) information about channel measurement, e.g., CSI, tothe eNB. With this information about the channel, the eNB is able toselect appropriate communication parameters to efficiently andeffectively perform wireless data communication with the UE. However,with increase in the numbers of antennas and channel paths of wirelesscommunication devices, so too has the amount of feedback increased thatmay be needed to ideally estimate the channel. This additionally-desiredchannel feedback may create additional overheads, thus reducing theefficiency of the wireless communication, for example, decrease the datarate.

SUMMARY

Embodiments of the present disclosure provide methods and apparatusesfor multiplexing higher-resolution channel state information (CSI) in anadvanced wireless communication system.

In one embodiment, a user equipment (UE) for channel state information(CSI) reporting in a wireless communication system is provided. The UEcomprises a transceiver configured to receive, from a base station (BS),configuration information for K CSI reports, wherein the configurationinformation includes resource allocation information for an uplinkcontrol information (UCI) transmission that includes UCI comprising NUCI parts. The UE further comprises a processor operably connected tothe transceiver, the processor configured to calculate the K CSI reportsand partition the K CSI reports into N parts, determine an availablenumber of information bits (B1) for the UCI transmission according tothe resource allocation information; determine a required number ofinformation bits (B2) for the UCI transmission according to thecalculated K CSI reports; and determine whether the required number ofinformation bits (B2) exceeds the available number of information bits(B1), wherein the transceiver is further configured to transmit, to theBS over one slot of an uplink channel, a first part of the N UCI partsincluding a first of the N parts of the K CSI reports when the requirednumber of information bits (B2) exceeds the available number ofinformation bits (B1), wherein K and N are positive integers.

In another embodiment, a base station (BS) for channel state information(CSI) reporting in a wireless communication system is provided. The BScomprises a transceiver configured to transmit, to a user equipment(UE), configuration information for K CSI reports, wherein theconfiguration information includes resource allocation information foran uplink control information (UCI) transmission that includes UCIcomprising N UCI parts; and receive, from the UE over one slot of anuplink channel, a first part of the N UCI parts including a first of Nparts of K CSI reports when a required number of information bits (B2)exceeds an available number of information bits (B1), wherein K and Nare positive integers, and wherein, at the UE: the K CSI reports arecalculated and partitioned into N parts; the available number ofinformation bits (B1) for the UCI transmission according to the resourceallocation information is determined; the required number of informationbits (B2) for the UCI transmission according to the calculated K CSIreports is determined; and whether the required number of informationbits (B2) exceeds the available number of information bits (B1) isdetermined.

In yet another embodiment, a method of user equipment (UE) for channelstate information (CSI) reporting in a wireless communication system isprovided. The method comprises receiving, from a base station (BS),configuration information for K CSI reports, wherein the configurationinformation includes resource allocation information for an uplinkcontrol information (UCI) transmission that includes UCI comprising NUCI parts; calculating the K CSI reports and partitioning the K CSIreports into N parts; determining an available number of informationbits (B1) for the UCI transmission according to the resource allocationinformation; determining a required number of information bits (B2) forthe UCI transmission according to the calculated K CSI reports;determining whether the required number of information bits (B2) exceedsthe available number of information bits (B1); and transmitting, to theBS over one slot of an uplink channel, a first part of the N UCI partsincluding a first of the N parts of the K CSI reports when the requirednumber of information bits (B2) exceeds the available number ofinformation bits (B1), wherein K and N are positive integers.

Other technical features may be readily apparent to one skilled in theart from the following figures, descriptions, and claims.

Before undertaking the DETAILED DESCRIPTION below, it may beadvantageous to set forth definitions of certain words and phrases usedthroughout this patent document. The term “couple” and its derivativesrefer to any direct or indirect communication between two or moreelements, whether or not those elements are in physical contact with oneanother. The terms “transmit,” “receive,” and “communicate,” as well asderivatives thereof, encompass both direct and indirect communication.The terms “include” and “comprise,” as well as derivatives thereof, meaninclusion without limitation. The term “or” is inclusive, meaningand/or. The phrase “associated with,” as well as derivatives thereof,means to include, be included within, interconnect with, contain, becontained within, connect to or with, couple to or with, be communicablewith, cooperate with, interleave, juxtapose, be proximate to, be boundto or with, have, have a property of, have a relationship to or with, orthe like. The term “controller” means any device, system or part thereofthat controls at least one operation. Such a controller may beimplemented in hardware or a combination of hardware and software and/orfirmware. The functionality associated with any particular controllermay be centralized or distributed, whether locally or remotely. Thephrase “at least one of,” when used with a list of items, means thatdifferent combinations of one or more of the listed items may be used,and only one item in the list may be needed. For example, “at least oneof: A, B, and C” includes any of the following combinations: A, B, C, Aand B, A and C, B and C, and A and B and C.

Moreover, various functions described below can be implemented orsupported by one or more computer programs, each of which is formed fromcomputer readable program code and embodied in a computer readablemedium. The terms “application” and “program” refer to one or morecomputer programs, software components, sets of instructions,procedures, functions, objects, classes, instances, related data, or aportion thereof adapted for implementation in a suitable computerreadable program code. The phrase “computer readable program code”includes any type of computer code, including source code, object code,and executable code. The phrase “computer readable medium” includes anytype of medium capable of being accessed by a computer, such as readonly memory (ROM), random access memory (RAM), a hard disk drive, acompact disc (CD), a digital video disc (DVD), or any other type ofmemory. A “non-transitory” computer readable medium excludes wired,wireless, optical, or other communication links that transporttransitory electrical or other signals. A non-transitory computerreadable medium includes media where data can be permanently stored andmedia where data can be stored and later overwritten, such as arewritable optical disc or an erasable memory device.

Definitions for other certain words and phrases are provided throughoutthis patent document. Those of ordinary skill in the art shouldunderstand that in many if not most instances, such definitions apply toprior as well as future uses of such defined words and phrases.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumerals represent like parts:

FIG. 1 illustrates an example wireless network according to embodimentsof the present disclosure;

FIG. 2 illustrates an example eNB according to embodiments of thepresent disclosure;

FIG. 3 illustrates an example UE according to embodiments of the presentdisclosure;

FIG. 4A illustrates a high-level diagram of an orthogonal frequencydivision multiple access transmit path according to embodiments of thepresent disclosure;

FIG. 4B illustrates a high-level diagram of an orthogonal frequencydivision multiple access receive path according to embodiments of thepresent disclosure;

FIG. 5 illustrates a transmitter block diagram for a PDSCH in a subframeaccording to embodiments of the present disclosure;

FIG. 6 illustrates a receiver block diagram for a PDSCH in a subframeaccording to embodiments of the present disclosure;

FIG. 7 illustrates a transmitter block diagram for a PUSCH in a subframeaccording to embodiments of the present disclosure;

FIG. 8 illustrates a receiver block diagram for a PUSCH in a subframeaccording to embodiments of the present disclosure;

FIG. 9 illustrates an example multiplexing of two slices according toembodiments of the present disclosure;

FIG. 10 illustrates an example antenna blocks according to embodimentsof the present disclosure;

FIG. 11 illustrates an example two-part UCI design according toembodiments of the present disclosure;

FIG. 12A illustrates another example two-part UCI design according toembodiments of the present disclosure;

FIG. 12B illustrates yet another example two-part UCI design accordingto embodiments of the present disclosure;

FIG. 12C illustrates yet another example two-part UCI design accordingto embodiments of the present disclosure;

FIG. 13 illustrates an example transmission priority according toembodiments of the present disclosure;

FIG. 14 illustrates an example three-part UCI design according toembodiments of the present disclosure;

FIG. 15 illustrates another example three-part UCI design according toembodiments of the present disclosure;

FIG. 16 illustrates an example multi-beam based system according toembodiments of the present disclosure; and

FIG. 17 illustrates an example beam report according to embodiments ofthe present disclosure.

DETAILED DESCRIPTION

FIG. 1 through FIG. 17, discussed below, and the various embodimentsused to describe the principles of the present disclosure in this patentdocument are by way of illustration only and should not be construed inany way to limit the scope of the disclosure. Those skilled in the artwill understand that the principles of the present disclosure may beimplemented in any suitably arranged system or device.

The following documents and standards descriptions are herebyincorporated by reference into the present disclosure as if fully setforth herein: 3GPP TS 36.211 v14.2.0, “E-UTRA, Physical channels andmodulation;” 3GPP TS 36.212 v14.2.0, “E-UTRA, Multiplexing and Channelcoding;” 3GPP TS 36.213 v14.2.0 “E-UTRA, Physical Layer Procedures;”3GPP TS 36.321 v14.2.0, “E-UTRA, Medium Access Control (MAC) protocolspecification;” 3GPP TS 36.331 v14.2.0, “E-UTRA, Radio Resource Control(RRC) protocol specification;” 3GPP TR 22.891 v1.2.0, “Feasibility Studyon New Services and Markets Technology Enablers;” and 3GPP TR 38.802v14.2.0, “Study on New Radio Access Technology Physical Layer Aspect.”

Aspects, features, and advantages of the disclosure are readily apparentfrom the following detailed description, simply by illustrating a numberof particular embodiments and implementations, including the best modecontemplated for carrying out the disclosure. The disclosure is alsocapable of other and different embodiments, and its several details canbe modified in various obvious respects, all without departing from thespirit and scope of the disclosure. Accordingly, the drawings anddescription are to be regarded as illustrative in nature, and not asrestrictive. The disclosure is illustrated by way of example, and not byway of limitation, in the figures of the accompanying drawings.

In the following, for brevity, both FDD and TDD are considered as theduplex method for both DL and UL signaling.

Although exemplary descriptions and embodiments to follow assumeorthogonal frequency division multiplexing (OFDM) or orthogonalfrequency division multiple access (OFDMA), this disclosure can beextended to other OFDM-based transmission waveforms or multiple accessschemes such as filtered OFDM (F-OFDM).

The present disclosure covers several components which can be used inconjunction or in combination with one another, or can operate asstandalone schemes.

To meet the demand for wireless data traffic having increased sincedeployment of 4G communication systems, efforts have been made todevelop an improved 5G or pre-5G communication system. Therefore, the 5Gor pre-5G communication system is also called a “beyond 4G network” or a“post LTE system.”

The 5G communication system is considered to be implemented in higherfrequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higherdata rates. To decrease propagation loss of the radio waves and increasethe transmission coverage, the beamforming, massive multiple-inputmultiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna,an analog beam forming, large scale antenna techniques and the like arediscussed in 5G communication systems.

In addition, in 5G communication systems, development for system networkimprovement is under way based on advanced small cells, cloud radioaccess networks (RANs), ultra-dense networks, device-to-device (D2D)communication, wireless backhaul communication, moving network,cooperative communication, coordinated multi-points (CoMP) transmissionand reception, interference mitigation and cancellation and the like.

In the 5G system, hybrid frequency shift keying and quadrature amplitudemodulation (FQAM) and sliding window superposition coding (SWSC) as anadaptive modulation and coding (AMC) technique, and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse codemultiple access (SCMA) as an advanced access technology have beendeveloped.

FIGS. 1-4B below describe various embodiments implemented in wirelesscommunications systems and with the use of orthogonal frequency divisionmultiplexing (OFDM) or orthogonal frequency division multiple access(OFDMA) communication techniques. The descriptions of FIGS. 1-3 are notmeant to imply physical or architectural limitations to the manner inwhich different embodiments may be implemented. Different embodiments ofthe present disclosure may be implemented in any suitably-arrangedcommunications system.

FIG. 1 illustrates an example wireless network according to embodimentsof the present disclosure. The embodiment of the wireless network shownin FIG. 1 is for illustration only. Other embodiments of the wirelessnetwork 100 could be used without departing from the scope of thisdisclosure.

As shown in FIG. 1, the wireless network includes an eNB 101, an eNB102, and an eNB 103. The eNB 101 communicates with the eNB 102 and theeNB 103. The eNB 101 also communicates with at least one network 130,such as the Internet, a proprietary Internet Protocol (IP) network, orother data network.

The eNB 102 provides wireless broadband access to the network 130 for afirst plurality of user equipments (UEs) within a coverage area 120 ofthe eNB 102. The first plurality of UEs includes a UE 111, which may belocated in a small business (SB); a UE 112, which may be located in anenterprise (E); a UE 113, which may be located in a WiFi hotspot (HS); aUE 114, which may be located in a first residence (R); a UE 115, whichmay be located in a second residence (R); and a UE 116, which may be amobile device (M), such as a cell phone, a wireless laptop, a wirelessPDA, or the like. The eNB 103 provides wireless broadband access to thenetwork 130 for a second plurality of UEs within a coverage area 125 ofthe eNB 103. The second plurality of UEs includes the UE 115 and the UE116. In some embodiments, one or more of the eNBs 101-103 maycommunicate with each other and with the UEs 111-116 using 5G, LTE,LTE-A, WiMAX, WiFi, or other wireless communication techniques.

Depending on the network type, the term “base station” or “BS” can referto any component (or collection of components) configured to providewireless access to a network, such as transmit point (TP),transmit-receive point (TRP), an enhanced base station (eNodeB or eNB),a 5G base station (gNB), a macrocell, a femtocell, a WiFi access point(AP), or other wirelessly enabled devices. Base stations may providewireless access in accordance with one or more wireless communicationprotocols, e.g., 5G 3GPP new radio interface/access (NR), long termevolution (LTE), LTE advanced (LTE-A), high speed packet access (HSPA),Wi-Fi 802.11a/b/g/n/ac, etc. For the sake of convenience, the terms “BS”and “TRP” are used interchangeably in this patent document to refer tonetwork infrastructure components that provide wireless access to remoteterminals. Also, depending on the network type, the term “userequipment” or “UE” can refer to any component such as “mobile station,”“subscriber station,” “remote terminal,” “wireless terminal,” “receivepoint,” or “user device.” For the sake of convenience, the terms “userequipment” and “UE” are used in this patent document to refer to remotewireless equipment that wirelessly accesses a BS, whether the UE is amobile device (such as a mobile telephone or smartphone) or is normallyconsidered a stationary device (such as a desktop computer or vendingmachine).

Dotted lines show the approximate extents of the coverage areas 120 and125, which are shown as approximately circular for the purposes ofillustration and explanation only. It should be clearly understood thatthe coverage areas associated with eNBs, such as the coverage areas 120and 125, may have other shapes, including irregular shapes, dependingupon the configuration of the eNBs and variations in the radioenvironment associated with natural and man-made obstructions.

As described in more detail below, one or more of the UEs 111-116include circuitry, programming, or a combination thereof, for efficientmultiplexing higher-resolution channel state information (CSI) in anadvanced wireless communication system. In certain embodiments, and oneor more of the eNBs 101-103 includes circuitry, programming, or acombination thereof, for efficient multiplexing higher-resolutionchannel state information (CSI) in an advanced wireless communicationsystem.

Although FIG. 1 illustrates one example of a wireless network, variouschanges may be made to FIG. 1. For example, the wireless network couldinclude any number of eNBs and any number of UEs in any suitablearrangement. Also, the eNB 101 could communicate directly with anynumber of UEs and provide those UEs with wireless broadband access tothe network 130. Similarly, each eNB 102-103 could communicate directlywith the network 130 and provide UEs with direct wireless broadbandaccess to the network 130. Further, the eNBs 101, 102, and/or 103 couldprovide access to other or additional external networks, such asexternal telephone networks or other types of data networks.

FIG. 2 illustrates an example eNB 102 according to embodiments of thepresent disclosure. The embodiment of the eNB 102 illustrated in FIG. 2is for illustration only, and the eNBs 101 and 103 of FIG. 1 could havethe same or similar configuration. However, eNBs come in a wide varietyof configurations, and FIG. 2 does not limit the scope of thisdisclosure to any particular implementation of an eNB.

As shown in FIG. 2, the eNB 102 includes multiple antennas 205 a-205 n,multiple RF transceivers 210 a-210 n, transmit (TX) processing circuitry215, and receive (RX) processing circuitry 220. The eNB 102 alsoincludes a controller/processor 225, a memory 230, and a backhaul ornetwork interface 235.

The RF transceivers 210 a-210 n receive, from the antennas 205 a-205 n,incoming RF signals, such as signals transmitted by UEs in the network100. The RF transceivers 210 a-210 n down-convert the incoming RFsignals to generate IF or baseband signals. The IF or baseband signalsare sent to the RX processing circuitry 220, which generates processedbaseband signals by filtering, decoding, and/or digitizing the basebandor IF signals. The RX processing circuitry 220 transmits the processedbaseband signals to the controller/processor 225 for further processing.

The TX processing circuitry 215 receives analog or digital data (such asvoice data, web data, e-mail, or interactive video game data) from thecontroller/processor 225. The TX processing circuitry 215 encodes,multiplexes, and/or digitizes the outgoing baseband data to generateprocessed baseband or IF signals. The RF transceivers 210 a-210 nreceive the outgoing processed baseband or IF signals from the TXprocessing circuitry 215 and up-converts the baseband or IF signals toRF signals that are transmitted via the antennas 205 a-205 n.

The controller/processor 225 can include one or more processors or otherprocessing devices that control the overall operation of the eNB 102.For example, the controller/processor 225 could control the reception offorward channel signals and the transmission of reverse channel signalsby the RF transceivers 210 a-210 n, the RX processing circuitry 220, andthe TX processing circuitry 215 in accordance with well-knownprinciples. The controller/processor 225 could support additionalfunctions as well, such as more advanced wireless communicationfunctions. For instance, the controller/processor 225 could support beamforming or directional routing operations in which outgoing signals frommultiple antennas 205 a-205 n are weighted differently to effectivelysteer the outgoing signals in a desired direction. Any of a wide varietyof other functions could be supported in the eNB 102 by thecontroller/processor 225.

The controller/processor 225 is also capable of executing programs andother processes resident in the memory 230, such as an OS. Thecontroller/processor 225 can move data into or out of the memory 230 asrequired by an executing process.

The controller/processor 225 is also coupled to the backhaul or networkinterface 235. The backhaul or network interface 235 allows the eNB 102to communicate with other devices or systems over a backhaul connectionor over a network. The interface 235 could support communications overany suitable wired or wireless connection(s). For example, when the eNB102 is implemented as part of a cellular communication system (such asone supporting 5G, LTE, or LTE-A), the interface 235 could allow the eNB102 to communicate with other eNBs over a wired or wireless backhaulconnection. When the eNB 102 is implemented as an access point, theinterface 235 could allow the eNB 102 to communicate over a wired orwireless local area network or over a wired or wireless connection to alarger network (such as the Internet). The interface 235 includes anysuitable structure supporting communications over a wired or wirelessconnection, such as an Ethernet or RF transceiver.

The memory 230 is coupled to the controller/processor 225. Part of thememory 230 could include a RAM, and another part of the memory 230 couldinclude a Flash memory or other ROM.

Although FIG. 2 illustrates one example of eNB 102, various changes maybe made to FIG. 2. For example, the eNB 102 could include any number ofeach component shown in FIG. 2. As a particular example, an access pointcould include a number of interfaces 235, and the controller/processor225 could support routing functions to route data between differentnetwork addresses. As another particular example, while shown asincluding a single instance of TX processing circuitry 215 and a singleinstance of RX processing circuitry 220, the eNB 102 could includemultiple instances of each (such as one per RF transceiver). Also,various components in FIG. 2 could be combined, further subdivided, oromitted and additional components could be added according to particularneeds.

FIG. 3 illustrates an example UE 116 according to embodiments of thepresent disclosure. The embodiment of the UE 116 illustrated in FIG. 3is for illustration only, and the UEs 111-115 of FIG. 1 could have thesame or similar configuration. However, UEs come in a wide variety ofconfigurations, and FIG. 3 does not limit the scope of this disclosureto any particular implementation of a UE.

As shown in FIG. 3, the UE 116 includes an antenna 305, a radiofrequency (RF) transceiver 310, TX processing circuitry 315, amicrophone 320, and receive (RX) processing circuitry 325. The UE 116also includes a speaker 330, a processor 340, an input/output (I/O)interface (IF) 345, a touchscreen 350, a display 355, and a memory 360.The memory 360 includes an operating system (OS) 361 and one or moreapplications 362.

The RF transceiver 310 receives, from the antenna 305, an incoming RFsignal transmitted by an eNB of the network 100. The RF transceiver 310down-converts the incoming RF signal to generate an intermediatefrequency (IF) or baseband signal. The IF or baseband signal is sent tothe RX processing circuitry 325, which generates a processed basebandsignal by filtering, decoding, and/or digitizing the baseband or IFsignal. The RX processing circuitry 325 transmits the processed basebandsignal to the speaker 330 (such as for voice data) or to the processor340 for further processing (such as for web browsing data).

The TX processing circuitry 315 receives analog or digital voice datafrom the microphone 320 or other outgoing baseband data (such as webdata, e-mail, or interactive video game data) from the processor 340.The TX processing circuitry 315 encodes, multiplexes, and/or digitizesthe outgoing baseband data to generate a processed baseband or IFsignal. The RF transceiver 310 receives the outgoing processed basebandor IF signal from the TX processing circuitry 315 and up-converts thebaseband or IF signal to an RF signal that is transmitted via theantenna 305.

The processor 340 can include one or more processors or other processingdevices and execute the OS 361 stored in the memory 360 in order tocontrol the overall operation of the UE 116. For example, the processor340 could control the reception of forward channel signals and thetransmission of reverse channel signals by the RF transceiver 310, theRX processing circuitry 325, and the TX processing circuitry 315 inaccordance with well-known principles. In some embodiments, theprocessor 340 includes at least one microprocessor or microcontroller.

The processor 340 is also capable of executing other processes andprograms resident in the memory 360, such as processes for CSI reportingon PUCCH. The processor 340 can move data into or out of the memory 360as required by an executing process. In some embodiments, the processor340 is configured to execute the applications 362 based on the OS 361 orin response to signals received from eNBs or an operator. The processor340 is also coupled to the I/O interface 345, which provides the UE 116with the ability to connect to other devices, such as laptop computersand handheld computers. The I/O interface 345 is the communication pathbetween these accessories and the processor 340.

The processor 340 is also coupled to the touchscreen 350 and the display355. The operator of the UE 116 can use the touchscreen 350 to enterdata into the UE 116. The display 355 may be a liquid crystal display,light emitting diode display, or other display capable of rendering textand/or at least limited graphics, such as from web sites.

The memory 360 is coupled to the processor 340. Part of the memory 360could include a random access memory (RAM), and another part of thememory 360 could include a Flash memory or other read-only memory (ROM).

Although FIG. 3 illustrates one example of UE 116, various changes maybe made to FIG. 3. For example, various components in FIG. 3 could becombined, further subdivided, or omitted and additional components couldbe added according to particular needs. As a particular example, theprocessor 340 could be divided into multiple processors, such as one ormore central processing units (CPUs) and one or more graphics processingunits (GPUs). Also, while FIG. 3 illustrates the UE 116 configured as amobile telephone or smartphone, UEs could be configured to operate asother types of mobile or stationary devices.

FIG. 4A is a high-level diagram of transmit path circuitry. For example,the transmit path circuitry may be used for an orthogonal frequencydivision multiple access (OFDMA) communication. FIG. 4B is a high-leveldiagram of receive path circuitry. For example, the receive pathcircuitry may be used for an orthogonal frequency division multipleaccess (OFDMA) communication. In FIGS. 4A and 4B, for downlinkcommunication, the transmit path circuitry may be implemented in a basestation (eNB) 102 or a relay station, and the receive path circuitry maybe implemented in a user equipment (e.g. user equipment 116 of FIG. 1).In other examples, for uplink communication, the receive path circuitry450 may be implemented in a base station (e.g. eNB 102 of FIG. 1) or arelay station, and the transmit path circuitry may be implemented in auser equipment (e.g. user equipment 116 of FIG. 1).

Transmit path circuitry comprises channel coding and modulation block405, serial-to-parallel (S-to-P) block 410, Size N Inverse Fast FourierTransform (IFFT) block 415, parallel-to-serial (P-to-S) block 420, addcyclic prefix block 425, and up-converter (UC) 430. Receive pathcircuitry 450 comprises down-converter (DC) 455, remove cyclic prefixblock 460, serial-to-parallel (S-to-P) block 465, Size N Fast FourierTransform (FFT) block 470, parallel-to-serial (P-to-S) block 475, andchannel decoding and demodulation block 480.

At least some of the components in FIGS. 4A 400 and 4B 450 may beimplemented in software, while other components may be implemented byconfigurable hardware or a mixture of software and configurablehardware. In particular, it is noted that the FFT blocks and the IFFTblocks described in this disclosure document may be implemented asconfigurable software algorithms, where the value of Size N may bemodified according to the implementation.

Furthermore, although this disclosure is directed to an embodiment thatimplements the Fast Fourier Transform and the Inverse Fast FourierTransform, this is by way of illustration only and may not be construedto limit the scope of the disclosure. It may be appreciated that in analternate embodiment of the present disclosure, the Fast FourierTransform functions and the Inverse Fast Fourier Transform functions mayeasily be replaced by discrete Fourier transform (DFT) functions andinverse discrete Fourier transform (IDFT) functions, respectively. Itmay be appreciated that for DFT and IDFT functions, the value of the Nvariable may be any integer number (i.e., 1, 4, 3, 4, etc.), while forFFT and IFFT functions, the value of the N variable may be any integernumber that is a power of two (i.e., 1, 2, 4, 8, 16, etc.).

In transmit path circuitry 400, channel coding and modulation block 405receives a set of information bits, applies coding (e.g., LDPC coding)and modulates (e.g., quadrature phase shift keying (QPSK) or quadratureamplitude modulation (QAM)) the input bits to produce a sequence offrequency-domain modulation symbols. Serial-to-parallel block 410converts (i.e., de-multiplexes) the serial modulated symbols to paralleldata to produce N parallel symbol streams where N is the IFFT/FFT sizeused in BS 102 and UE 116. Size N IFFT block 415 then performs an IFFToperation on the N parallel symbol streams to produce time-domain outputsignals. Parallel-to-serial block 420 converts (i.e., multiplexes) theparallel time-domain output symbols from Size N IFFT block 415 toproduce a serial time-domain signal. Add cyclic prefix block 425 theninserts a cyclic prefix to the time-domain signal. Finally, up-converter430 modulates (i.e., up-converts) the output of add cyclic prefix block425 to RF frequency for transmission via a wireless channel. The signalmay also be filtered at baseband before conversion to RF frequency.

The transmitted RF signal arrives at UE 116 after passing through thewireless channel, and reverse operations to those at eNB 102 areperformed. Down-converter 455 down-converts the received signal tobaseband frequency, and remove cyclic prefix block 460 removes thecyclic prefix to produce the serial time-domain baseband signal.Serial-to-parallel block 465 converts the time-domain baseband signal toparallel time-domain signals. Size N FFT block 470 then performs an FFTalgorithm to produce N parallel frequency-domain signals.Parallel-to-serial block 475 converts the parallel frequency-domainsignals to a sequence of modulated data symbols. Channel decoding anddemodulation block 480 demodulates and then decodes the modulatedsymbols to recover the original input data stream.

Each of eNBs 101-103 may implement a transmit path that is analogous totransmitting in the downlink to user equipment 111-116 and may implementa receive path that is analogous to receiving in the uplink from userequipment 111-116. Similarly, each one of user equipment 111-116 mayimplement a transmit path corresponding to the architecture fortransmitting in the uplink to eNBs 101-103 and may implement a receivepath corresponding to the architecture for receiving in the downlinkfrom eNBs 101-103.

5G communication system use cases have been identified and described.Those use cases can be roughly categorized into three different groups.In one example, enhanced mobile broadband (eMBB) is determined to dowith high bits/sec requirement, with less stringent latency andreliability requirements. In another example, ultra reliable and lowlatency (URLL) is determined with less stringent bits/sec requirement.In yet another example, massive machine type communication (mMTC) isdetermined that a number of devices can be as many as 100,000 to 1million per km2, but the reliability/throughput/latency requirementcould be less stringent. This scenario may also involve power efficiencyrequirement as well, in that the battery consumption should be minimizedas possible.

A communication system includes a Downlink (DL) that conveys signalsfrom transmission points such as Base Stations (BSs) or NodeBs to UserEquipments (UEs) and an Uplink (UL) that conveys signals from UEs toreception points such as NodeBs. A UE, also commonly referred to as aterminal or a mobile station, may be fixed or mobile and may be acellular phone, a personal computer device, or an automated device. AneNodeB, which is generally a fixed station, may also be referred to asan access point or other equivalent terminology. For LTE systems, aNodeB is often referred as an eNodeB.

In a communication system, such as LTE system, DL signals can includedata signals conveying information content, control signals conveying DLcontrol information (DCI), and reference signals (RS) that are alsoknown as pilot signals. An eNodeB transmits data information through aphysical DL shared channel (PDSCH). An eNodeB transmits DCI through aphysical DL control channel (PDCCH) or an Enhanced PDCCH (EPDCCH).

An eNodeB transmits acknowledgement information in response to datatransport block (TB) transmission from a UE in a physical hybrid ARQindicator channel (PHICH). An eNodeB transmits one or more of multipletypes of RS including a UE-common RS (CRS), a channel state informationRS (CSI-RS), or a demodulation RS (DMRS). A CRS is transmitted over a DLsystem bandwidth (BW) and can be used by UEs to obtain a channelestimate to demodulate data or control information or to performmeasurements. To reduce CRS overhead, an eNodeB may transmit a CSI-RSwith a smaller density in the time and/or frequency domain than a CRS.DMRS can be transmitted only in the BW of a respective PDSCH or EPDCCHand a UE can use the DMRS to demodulate data or control information in aPDSCH or an EPDCCH, respectively. A transmission time interval for DLchannels is referred to as a subframe and can have, for example,duration of 1 millisecond.

DL signals also include transmission of a logical channel that carriessystem control information. A BCCH is mapped to either a transportchannel referred to as a broadcast channel (BCH) when the DL signalsconvey a master information block (MIB) or to a DL shared channel(DL-SCH) when the DL signals convey a System Information Block (SIB).Most system information is included in different SIBs that aretransmitted using DL-SCH. A presence of system information on a DL-SCHin a subframe can be indicated by a transmission of a correspondingPDCCH conveying a codeword with a cyclic redundancy check (CRC)scrambled with special system information RNTI (SI-RNTI). Alternatively,scheduling information for a SIB transmission can be provided in anearlier SIB and scheduling information for the first SIB (SIB-1) can beprovided by the MIB.

DL resource allocation is performed in a unit of subframe and a group ofphysical resource blocks (PRBs). A transmission BW includes frequencyresource units referred to as resource blocks (RBs). Each RB includesN_(sc) ^(RB) sub-carriers, or resource elements (REs), such as 12 REs. Aunit of one RB over one subframe is referred to as a PRB. A UE can beallocated M_(PDSCH) RBs for a total of M_(sc) ^(PDSCH)=M_(PDSCH)·N_(sc)^(RB) REs for the PDSCH transmission BW.

UL signals can include data signals conveying data information, controlsignals conveying UL control information (UCI), and UL RS. UL RSincludes DMRS and Sounding RS (SRS). A UE transmits DMRS only in a BW ofa respective PUSCH or PUCCH. An eNodeB can use a DMRS to demodulate datasignals or UCI signals. A UE transmits SRS to provide an eNodeB with anUL CSI. A UE transmits data information or UCI through a respectivephysical UL shared channel (PUSCH) or a Physical UL control channel(PUCCH). If a UE needs to transmit data information and UCI in a same ULsubframe, the UE may multiplex both in a PUSCH. UCI includes HybridAutomatic Repeat request acknowledgement (HARQ-ACK) information,indicating correct (ACK) or incorrect (NACK) detection for a data TB ina PDSCH or absence of a PDCCH detection (DTX), scheduling request (SR)indicating whether a UE has data in the UE's buffer, rank indicator(RI), and channel state information (CSI) enabling an eNodeB to performlink adaptation for PDSCH transmissions to a UE. HARQ-ACK information isalso transmitted by a UE in response to a detection of a PDCCH/EPDCCHindicating a release of semi-persistently scheduled PDSCH.

An UL subframe includes two slots. Each slot includes N_(symb) ^(UL)symbols for transmitting data information, UCI, DMRS, or SRS. Afrequency resource unit of an UL system BW is a RB. A UE is allocatedN_(RB) RBs for a total of N_(RB)·N_(sc) ^(RB) REs for a transmission BW.For a PUCCH, N_(RB)=1. A last subframe symbol can be used to multiplexSRS transmissions from one or more UEs. A number of subframe symbolsthat are available for data/UCI/DMRS transmission is N_(symb)=2.(N_(symb) ^(UL)−1)−N_(SRS), where N_(SRS)=1 if a last subframe symbol isused to transmit SRS and N_(SRS)=0 otherwise.

FIG. 5 illustrates a transmitter block diagram 500 for a PDSCH in asubframe according to embodiments of the present disclosure. Theembodiment of the transmitter block diagram 500 illustrated in FIG. 5 isfor illustration only. FIG. 5 does not limit the scope of thisdisclosure to any particular implementation of the transmitter blockdiagram 500.

As shown in FIG. 5, information bits 510 are encoded by encoder 520,such as a turbo encoder, and modulated by modulator 530, for exampleusing quadrature phase shift keying (QPSK) modulation. A serial toparallel (S/P) converter 540 generates M modulation symbols that aresubsequently provided to a mapper 550 to be mapped to REs selected by atransmission BW selection unit 555 for an assigned PDSCH transmissionBW, unit 560 applies an Inverse fast Fourier transform (IFFT), theoutput is then serialized by a parallel to serial (P/S) converter 570 tocreate a time domain signal, filtering is applied by filter 580, and asignal transmitted 590. Additional functionalities, such as datascrambling, cyclic prefix insertion, time windowing, interleaving, andothers are well known in the art and are not shown for brevity.

FIG. 6 illustrates a receiver block diagram 600 for a PDSCH in asubframe according to embodiments of the present disclosure. Theembodiment of the diagram 600 illustrated in FIG. 6 is for illustrationonly. FIG. 6 does not limit the scope of this disclosure to anyparticular implementation of the diagram 600.

As shown in FIG. 6, a received signal 610 is filtered by filter 620, REs630 for an assigned reception BW are selected by BW selector 635, unit640 applies a fast Fourier transform (FFT), and an output is serializedby a parallel-to-serial converter 650. Subsequently, a demodulator 660coherently demodulates data symbols by applying a channel estimateobtained from a DMRS or a CRS (not shown), and a decoder 670, such as aturbo decoder, decodes the demodulated data to provide an estimate ofthe information data bits 680. Additional functionalities such astime-windowing, cyclic prefix removal, de-scrambling, channelestimation, and de-interleaving are not shown for brevity.

FIG. 7 illustrates a transmitter block diagram 700 for a PUSCH in asubframe according to embodiments of the present disclosure. Theembodiment of the block diagram 700 illustrated in FIG. 7 is forillustration only. FIG. 7 does not limit the scope of this disclosure toany particular implementation of the block diagram 700.

As shown in FIG. 7, information data bits 710 are encoded by encoder720, such as a turbo encoder, and modulated by modulator 730. A discreteFourier transform (DFT) unit 740 applies a DFT on the modulated databits, REs 750 corresponding to an assigned PUSCH transmission BW areselected by transmission BW selection unit 755, unit 760 applies an IFFTand, after a cyclic prefix insertion (not shown), filtering is appliedby filter 770 and a signal transmitted 780.

FIG. 8 illustrates a receiver block diagram 800 for a PUSCH in asubframe according to embodiments of the present disclosure. Theembodiment of the block diagram 800 illustrated in FIG. 8 is forillustration only. FIG. 8 does not limit the scope of this disclosure toany particular implementation of the block diagram 800.

As shown in FIG. 8, a received signal 810 is filtered by filter 820.Subsequently, after a cyclic prefix is removed (not shown), unit 830applies a FFT, REs 840 corresponding to an assigned PUSCH reception BWare selected by a reception BW selector 845, unit 850 applies an inverseDFT (IDFT), a demodulator 860 coherently demodulates data symbols byapplying a channel estimate obtained from a DMRS (not shown), a decoder870, such as a turbo decoder, decodes the demodulated data to provide anestimate of the information data bits 880.

In next generation cellular systems, various use cases are envisionedbeyond the capabilities of LTE system. Termed 5G or the fifth generationcellular system, a system capable of operating at sub-6 GHz and above-6GHz (for example, in mmWave regime) becomes one of the requirements. In3GPP TR 22.891, 74 5G use cases has been identified and described; thoseuse cases can be roughly categorized into three different groups. Afirst group is termed ‘enhanced mobile broadband’ (eMBB), targeted tohigh data rate services with less stringent latency and reliabilityrequirements. A second group is termed “ultra-reliable and low latency(URLL)” targeted for applications with less stringent data raterequirements, but less tolerant to latency. A third group is termed“massive MTC (mMTC)” targeted for large number of low-power deviceconnections such as 1 million per km² with less stringent thereliability, data rate, and latency requirements.

In order for the 5G network to support such diverse services withdifferent quality of services (QoS), one method has been identified inLTE specification, called network slicing. To utilize PHY resourcesefficiently and multiplex various slices (with different resourceallocation schemes, numerologies, and scheduling strategies) in DL-SCH,a flexible and self-contained frame or subframe design is utilized.

FIG. 9 illustrates an example multiplexing of two slices 900 accordingto embodiments of the present disclosure. The embodiment of themultiplexing of two slices 900 illustrated in FIG. 9 is for illustrationonly. FIG. 9 does not limit the scope of this disclosure to anyparticular implementation of the multiplexing of two slices 900.

Two exemplary instances of multiplexing two slices within a commonsubframe or frame are depicted in FIG. 9. In these exemplaryembodiments, a slice can be composed of one or two transmissioninstances where one transmission instance includes a control (CTRL)component (e.g., 920 a, 960 a, 960 b, 920 b, or 960 c) and a datacomponent (e.g., 930 a, 970 a, 970 b, 930 b, or 970 c). In embodiment910, the two slices are multiplexed in frequency domain whereas inembodiment 950, the two slices are multiplexed in time domain. These twoslices can be transmitted with different sets of numerology.

LTE specification supports up to 32 CSI-RS antenna ports which enable aneNB to be equipped with a large number of antenna elements (such as 64or 128). In this case, a plurality of antenna elements is mapped ontoone CSI-RS port. For next generation cellular systems such as 5G, themaximum number of CSI-RS ports can either remain the same or increase.

FIG. 10 illustrates an example antenna blocks 1000 according toembodiments of the present disclosure. The embodiment of the antennablocks 1000 illustrated in FIG. 10 is for illustration only. FIG. 10does not limit the scope of this disclosure to any particularimplementation of the antenna blocks 1000.

For mmWave bands, although the number of antenna elements can be largerfor a given form factor, the number of CSI-RS ports—which can correspondto the number of digitally precoded ports—tends to be limited due tohardware constraints (such as the feasibility to install a large numberof ADCs/DACs at mmWave frequencies) as illustrated in FIG. 10. In thiscase, one CSI-RS port is mapped onto a large number of antenna elementswhich can be controlled by a bank of analog phase shifters. One CSI-RSport can then correspond to one sub-array which produces a narrow analogbeam through analog beamforming. This analog beam can be configured tosweep across a wider range of angles by varying the phase shifter bankacross symbols or subframes. The number of sub-arrays (equal to thenumber of RF chains) is the same as the number of CSI-RS portsN_(CSI-PORT). A digital beamforming unit performs a linear combinationacross N_(CSI-PORT) analog beams to further increase precoding gain.While analog beams are wideband (hence not frequency-selective), digitalprecoding can be varied across frequency sub-bands or resource blocks.In LTE, depending on the number of transmission layers, a maximum of twocodewords are used for DL and UL data transmissions (on DL data channelsuch as PDSCH or PDCH, and UL data channel such as PUSCH or PUCH,respectively) for spatial multiplexing. For L=1 layer, one codeword ismapped to one layer. For L>1 layers, each of the two codewords is mappedto at least one layer where L layers (rank-L) are divided almost evenlyacross the two codewords. In addition, one codeword can also be mappedto >1 layers especially when only one of the two codewords is to beretransmitted.

Although beneficial for facilitating modulation-and-coding-scheme (MCS)adaptation per codeword (CW) and MMSE-SIC (MMSE with successiveinterference cancellation) receiver, it costs some significant overheadover a single CW mapping. DL overhead comes from the additional DCIpayload due to 2 fixed MCS fields and 2 fixed NDI-RV (DL HARQ related)fields. UL overhead comes from the need for two CQIs (full 4-bit+delta3-bit for wideband CQI, and 2× overhead for subband CQI) for rank >1 andtwo DL HARQ-ACKs for rank >1. Added to that is the complexity of havingto accommodate more than one layer mapping schemes in case ofretransmission. Furthermore, when distributed MIMO such as non-coherentjoint transmission (NC-JT) is incorporated into design requirements for5G NR, the number of codewords (CWs) used for DL and UL transmissionsper UE can increase with the number of TRPs. Therefore, using only oneCW per PDSCH/PUSCH assignment per UE is beneficial for NR, at least forup to rank-2 transmission, or up to rank-4 transmission. Else, two-CWper PDSCH/PUSCH assignment per UE can be used for higher ranks.Alternatively, one CW per PDSCH/PUSCH assignment per UE can be used forall ranks.

In addition, periodic CSI (P-CSI) reporting in LTE is reported acrossmultiple slots/Subframe/Slots. This results in complex priority rules(due to dropping) and inter-Subframe/Slot/slot dependencies which isunsuitable for TDD and LAA (since the availability of ULSubframe/Slots/slots is conditional). This mechanism is susceptible toerror propagations and stale CSI. The main reasons are: 1) PUCCH format2 is too small to carry one-shot CSI reporting, 2) RI-dependent CQIpayload (due to the use of maximum of 2 CWs), 3) RI-dependent PMIpayload.

Yet another drawback of LTE design lies in separately encoding RI (andCRI) from CQI and PMI. This is necessary since the payload for CQI andPMI is rank-dependent. Since the payload for RI is small and RI needs tobe protected more compared to CQI and PMI (to ensure correct decoding ofCQI and PMI), RI is also mapped differently from CQI and PMI. But evenwith such a strong protection, there is no mechanism for the gNB tocheck whether RI (and CRI) decoding is successful or not (due to theabsence of CRC).

Therefore, there is a need for a different design for CSI and itsassociated uplink control information (UCI) multiplexing schemes when asingle codeword (CW) is mapped to all the L≥1 transmission layers. Thepresent disclosure includes several components. Here, UCI includesreporting parameters associated with CSI acquisition, such as CQI(channel quality indicator), PMI (precoding matrix index), RI (rankindicator), and CRI (CSI-RS resource index/indicator). Other CSIparameters can also be included. Unless otherwise stated, this UCI doesnot include HARQ-ACK. In the present disclosure, this UCI can also bereferred to as CSI-UCI for illustrative purposes.

All the following components and embodiments are applicable for ULtransmission with CP-OFDM (cyclic prefix OFDM) waveform as well asDFT-SOFDM (DFT-spread OFDM) and SC-FDMA (single-carrier FDMA) waveforms.Furthermore, all the following components and embodiments are applicablefor UL transmission when the scheduling unit in time is either oneSubframe/Slot (which can consist of one or multiple slots) or one slot.

The aperiodic CSI (A-CSI) accommodates reporting with differentfrequency granularities (one report for all the N_(SB) subbands in aconfigured CSI reporting band, or one report per subband in a configuredCSI reporting band) for CQI and PMI. RI and CRI (and its associatedCSI-RSRP(s)), however, are only reported with one frequency granularity(one report for all the N_(SB) subbands in a configured CSI reportingband).

In addition, if single-CW layer mapping is used, CQI payload isindependent of RI value. PMI payload, however, can be dependent on RIvalue. For example, for Type I (normal) CSI with lower spatialresolution, PMI payload can be made RI-independent or less dependent onRI value. For Type II (enhanced) CSI with higher spatial resolution, PMIpayload can be RI-dependent (for instance, PMI payload can beproportional to RI value with per-layer quantization/feedback). Thefollowing embodiments, however, can be utilized whether single-CW layermapping is used or not. For example, they are also applicable for alayer mapping where the maximum of 2 CWs are used (such as that used forLTE).

Component 1—Aperiodic CSI (A-CSI) Reporting in Two Parts.

In one embodiment of the present disclosure (Scheme 1), the CSIparameters included in PMI are partitioned into two parts: PMI part Iand PMI part II. When a UE is configured with RI reporting, RI, CQI, andPMI part I are jointly encoded to form a codeword segment 1. PMI part IIis jointly encoded to form another codeword segment 2.

For aperiodic CSI (A-CSI) reporting, a gNB allocates resource (UL RBs)for UCI transmission (e.g. on PUSCH) without knowing what the UE reportsfor RI. For Type II, the payload difference between RI=1 and RI=2 islarge, i.e., the payload for RI=2 is approximately 2 times of that forRI=1. The resource allocation is according to at least one of thefollowing schemes.

In scheme 1A, the PMI part I and PMI part II correspond to the PMI forlayer 1 and layer 2, respectively, and resource allocation for thecodeword segment 1 (which includes PMI part I) and codeword segment 2(which includes PMI part II) are in two different slots (or subframes).When A-CSI reporting is triggered, PUSCH resource is allocated accordingto RI=1 CSI payload size. Depending on the RI value (included incodeword segment 1) reported in the first CSI reporting instance, gNBdetermines whether to trigger another A-CSI reporting for codewordsegment 2. If triggered, PUSCH resources could be allocated based on thereceived CSI contents in the first CSI reporting instance.

In a variation of this scheme (1A-1), the resource allocation for thecodeword segment 2 (if RI=2 is reported in codeword segment 1) is fixed.So, there is no need for additional signaling for the resource locationfor codeword segment 2. For example, the resource allocation (UL RBs)can be the same as that for codeword segment 1, i.e. the same UL RBs ina different slot, whose location is fixed with respect to the slot inwhich codeword segment 1 is configured to be reported.

In another variation of this scheme (1A-2), the resource allocation forthe codeword segment 2 (if RI=2 is reported in codeword segment 1) isconfigured (via DCI triggering or signaling). For example, the resourceallocation (UL RBs) can be determined based on the beta offset (in LTE)with respect to the resource allocation for codeword segment 1.

In scheme 1B, the PMI part I and PMI part II are configured to bereported in a single slot or subframe according to at least one of thefollowing variations of scheme 1B. The term “configured RI” or “toconfigure the value of RI” in these variations of scheme 1B (andelsewhere in the present disclosure) refers to at least one of the twodefinitions (DEF1 and DEF2).

In some embodiments (DEF1), it means to force (restrict) the UE toreport the same RI value as that signaled to the UE. Or, optionally, inthis definition, the UE does not report RI since it is the same as theconfigured RI value. In other embodiments (DEF2), it signifies anassumed value of RI in relation to the indicated resource allocation(RA) for UCI transmission which the UE needs to know—but does not implythat the UE is restricted to report the same RI value as that assumed inrelation to the RA (i.e., UE can report a different RI value from theassumed value). Here, UCI includes CSI reporting which includes at leastone of the following: CRI, RI, PMI, and CQI.

In both DEF1 and DEF2, the RA for UCI transmission is signaled to the UEin the form of a RA field in an UL-related (or, optionally, DL-related)DCI which includes a CSI request field. The “configured RI” is signaledto the UE via either higher-layer (such as RRC) signaling, L2 signaling(such as MAC CE), or L1 signaling (such as DCI). If signaled via L1signaling, the “configured RI” (signaled in the form of a DCI field,termed here for illustrative purposes, the DCI field X) is eithersignaled together in the same UL-related (or, optionally, DL-related)DCI which includes the RA field, or signaled separately in another DCI.If signaled in the same UL-related (or, optionally, DL-related) DCI asthe RA field, the DCI field X can be signaled either as a separate fieldfrom the RA field or a part of the RA field. If signaled as a part ofthe RA field, resource allocation definition for UCI transmission isdefined to include the “configured RI.”

In one embodiment of Scheme 1B-0, the resource allocation (RA) scheme orsignaling for UL-related DCI is used for the purpose of UCI transmissionassuming a fixed value of RI if Type II CSI reporting is configuredregardless of the reported value of RI. For example, the fixed value ofRI for RA is RI=2.

In one embodiment of Scheme 1B-1, the resource allocation (RA) scheme orsignaling for UL-related DCI is used for the purpose of UCItransmission. UE (and later gNB upon receiving the A-CSI report)interprets the RA field differently depending on the value of RI. The UEassumes a default RA=X PRBs which corresponds to a fixed RI value. Forexample, when X PRBs correspond to RI=1, then the UE assumes that thenumber of PRBs=K*X when RI=2, where K is a constant.

In one example of Alt1.1, K is configurable either semi-statically (viaRRC, higher layer signaling), or more dynamically (via MAC CE based orDCI signaling).

In one example of Alt1.2, K is pre-defined in the specification, e.g.K=1.5, or 2.

In one example of Alt1.3, K is determined implicitly depending on, e.g.frequency granularity (“wideband, or partial band, or subband” or “onereport for all subbands or one report per subband”) of CQI and/or PMI.TABLE 1 shows an example.

TABLE 1 K values Frequency granularity for PMI K Wideband 1 Partial band2 Subband 2

In one embodiment of Scheme 1B-2, in addition to the normal bitallocation for UCI transmission, additional bit(s) is (are) added inUL-related DCI to signal RA for both RI=1 and RI=2 if Type II CSIreporting is configured. These additional bit(s) can be a part of atleast one of or a combination of RA field or CSI request field, or otherfields in the UL-related DCI. With these additional bits, the UL-relatedDCI signaling is expanded to indicate two hypotheses for two differentRI values.

In one embodiment of Scheme 1B-3, the gNB triggers A-CSI for a certainvalue of RI and configures the value of RI in the UL-related DCI (orDL-related DCI). The RA is according to the CSI (including PMI, CQI, andRI) reporting payload (number of bits) corresponding to the configuredvalue of RI. Note that in this case even when the UE can support RI=2,the gNB may configure only RI=1 CSI. The UE reports RI and remaining CSI(including at least one of CRI, PMI, and CQI) according to at least oneof the following three alternatives:

In one example of Alt1.4, a UE does not report RI and reports the CSI(including at least one of CRI, PMI, and CQI) corresponding to theconfigured value of RI. Here the definition of “configured RI” isassumed to be according to DEF1.

In one example of Alt1.5, a UE reports RI, which can be different fromthe RI configured by the gNB. For example, if the configured value ofRI=2, UE can report RI=1 or RI=2. Here the definition of “configured RI”is assumed to be according to DEF2. At least one of the followingsub-alternatives is used for remaining CSI reporting.

In one example of Alt 1.5a, the UE reports the remaining CSI (includingat least one of CRI, PMI, and CQI) according to the assumed value of RIin relation to the indicated resource allocation (RA) for UCItransmission.

In one example of Alt1.5b, the UE reports the remaining CSI (includingat least one of CRI, PMI, and CQI) according to the reported value ofRI.

If RI can take a value from {1, 2}, then a 1-bit field is used in DCI toconfigure RI.

If RI can take a value from {1, 2, 3, 4}, then a 2-bit field is used inDCI to configure RI.

Alternatively, if RI can take a value from {1, 2, 3, 4}, then a 1-bitfield is used in DCI to configure either set S1={1} or set S2={2, 3, 4}for RI for remaining CSI (PMI and CQI) reporting. In this lateralternative, the PMI reporting payload (number of bits) for the RI valuein set S1 is significantly differently (e.g. 2 times) from that in setS2. The PMI reporting payload (number of bits) for RI values in set S2is either the same or comparable.

The RA is according to the CSI reporting payload for the configured setS1 or S2 for RI. Also, if the configured value of RI equals set S1, thenthe UE either does not report RI (Alt 1.4) or reports a 2-bit RIindicating values from {1, 2, 3, 4} (Alt 1.5). And if the configuredvalues of RI equals set S2, then the UE reports a 3-bit RI indicatingvalues from S={(1, 2), (1, 3), (1, 4), (2, 2), (3, 3), (4, 4)}, where apair (a, b) in set S indicates reported RI=a and reported remaining CSI(PMI and CQI) corresponding to the configured RI=b.

In a variation of the aforementioned scheme, the value of RI isconfigured semi-statically via higher layer RRC signaling or moredynamic MAC CE based signaling.

In one embodiment of Scheme 1B-4, the gNB triggers A-CSI for certainlayer(s) and configures the value(s) of layer(s) in the UL-related DCI(or DL-related DCI). The RA is according to the CSI (including PMI, CQI,and RI) reporting payload (number of bits) corresponding to theconfigured value(s) of layer(s). Note that in this case even when the UEcan support 2 layers (layer 0 and layer 1), the gNB may configure onlyone layer (layer 0 or layer 1) CSI. The UE reports RI and remaining CSI(including at least one of CRI, PMI, and CQI) according to at least oneof the following three alternatives.

In one example of Alt1.6, a UE does not report RI and reports the CSI(including at least one of CRI, PMI, and CQI) corresponding to theconfigured value(s) of layer(s). Here the configured number of layerscorresponds to “configured RI” and the definition of “configured RI” isassumed to be according to DEF1.

In one example of Alt1.7, a UE reports RI, which can be different fromthe number of layer(s) configured by the gNB. For example, if theconfigured value(s) of layer(s) is 2, UE can report RI=1 or RI=2. Herethe configured number of layers corresponds to “configured RI” and thedefinition of “configured RI” is assumed to be according to DEF2. Atleast one of the following sub-alternatives is used for remaining CSIreporting.

In one example of Alt 1.7a, the UE reports the remaining CSI (includingat least one of CRI, PMI, and CQI) according to the assumed value of RI(=configured number of layers) in relation to the indicated resourceallocation (RA) for UCI transmission.

In one example of Alt1.7b, the UE reports the remaining CSI (includingat least one of CRI, PMI, and CQI) according to the reported value ofRI.

If an RI can take a value from {1, 2}, then value(s) of layer(s) is/areconfigured according to at least one of the following alternatives: (Alt1.8) a 1-bit field is used in DCI to configure either layer 0 or layer1; (Alt 1.9) a 1-bit field is used in DCI to configure either layer 0 orboth layer 0 and layer 1; and (Alt 1.10) a 2-bit field is used in DCI toconfigure either layer 0 or layer 1 or both layer 0 and layer 1.

If an RI can take a value from {1, 2, 3, 4}, then value(s) of layer(s)is/are configured according to at least one of the followingalternatives: (Alt 1.11) a 1-bit field is used in DCI to configureeither layer 0 or {layer 1, layer 2, layer 3}; (Alt 1.12) a 2-bit fieldis used in DCI to configure either layer 0 or layer 1 or layer 2 orlayer 3; (Alt 1.13) a 2-bit field is used in DCI to configure eitherlayer 0 or {layer 0, layer 1} or {layer 0, layer 1, layer 2} or {layer0, layer 1, layer 2, layer 3}; and (Alt 1.14) a 2-bit field is used inDCI to configure either layer 0 or layer 1 or {layer 0, layer 1} or{layer 2, layer 3}.

Alternatively, if an RI can take a value from {1, 2, 3, 4}, then a 1-bitfield is used in DCI to configure either set S1={layer 0} or setS2={layer 1, layer 2, layer 3} for RI for (PMI and CQI). In this lateralternative, the PMI reporting payload (number of bits) for the layervalue in set S1 is significantly differently (e.g. 2 times) from that inset S2. The PMI reporting payload (number of bits) for layer values inset S2 is either the same or comparable. The RA is according to the CSIreporting payload for the configured set S1 or S2 for RI. Also, if theconfigured value of layer equals S1, then the UE either does not reportRI (Alt 1.6) or reports a 2-bit RI indicating values from {1, 2, 3, 4}(Alt 1.7). And if the configured values of layers equal set S2, then theUE reports a 3-bit RI indicating values from S={(1, 2), (1, 3), (1, 4),(2, 2), (3, 3), (4, 4)}, where a pair (a, b) in set S indicates reportedRI=a (indicating layer 0) and reported remaining CSI (PMI and CQI)corresponding to the configured RI=b (indicating layer 1, . . . , layerb−1).

In a variation of the aforementioned scheme, the value(s) of layer(s)is/are configured semi-statically via higher layer RRC signaling or moredynamic MAC CE based signaling.

In one embodiment of Scheme 1B-5, the gNB triggers A-CSI with a certainRA size and configures the value of RA size in the UL-related DCI (orDL-related DCI). The RA for CSI (including PMI, CQI, and RI) reportingis according to the configured value of RA size. Note that the UE canreport A-CSI that requires two different RA sizes for RI=1 and RI=2, butthe gNB can configure RA size for RI=1 CSI. The UE reports RI andremaining CSI (including at least one of CRI, PMI, and CQI) according toat least one of the following three alternatives.

In one example of Alt1.15, a UE does not report RI and reports the CSI(including at least one of CRI, PMI, and CQI) corresponding to RIassociated with the configured value of RA size. Here the configured RAsize corresponds to “configured RI” and the definition of “configuredRI” is assumed to be according to DEF1.

In one example of Alt1.16, a UE reports RI, which can be different fromthe RI corresponding to the configured value of RA size by the gNB. Forexample, if the configured value of RA size correspond to RI=2, UE canreport RI=1 or RI=2. Here the configured RA size corresponds to“configured RI” and the definition of “configured RI” is assumed to beaccording to DEF2. At least one of the following sub-alternatives isused for remaining CSI reporting.

In one example of Alt 1.16a, the UE reports the remaining CSI (includingat least one of CRI, PMI, and CQI) according to the assumed value of RI(corresponds to the configured RA size) in relation to the indicatedresource allocation (RA) for UCI transmission.

In one example of Alt1.16b, the UE reports the remaining CSI (includingat least one of CRI, PMI, and CQI) according to the reported value ofRI.

If RA size can take a value from {1, 2} that one-to-one corresponds toRI value in {1, 2}, then a 1-bit field is used in DCI to configure RAsize 1 or 2 corresponding to RI=1 or RI=2 respectively.

If RA size can take a value from {1, 2, 3, 4} that one-to-onecorresponds to RI value in {1, 2, 3, 4}, then a 2-bit field is used inDCI to configure RA size 1, 2, 3, or 2 corresponding to RI=1, 2, 3, or 4respectively.

Alternatively, if RA size can take a value from {1, 2} that one-to-onecorresponds to RI value in two sets, e.g. S1={1} and S2={2, 3, 4} for RIfor remaining CSI (PMI and CQI) reporting, then a 1-bit field is used inDCI to configure RA size 1 or 2 corresponding to RI in set S1 or RI inset S2, respectively. In this later alternative, the PMI reportingpayload (number of bits) for the RI value in set S1 is significantlydifferently (e.g. 2 times) from that in set S2. The PMI reportingpayload (number of bits) for RI values in set S2 is either the same orcomparable.

The RA is according to the CSI reporting payload for the configured setS1 or S2 for RI. Also, if the configured value of RA size=1 thatcorresponds to RI=S1, then the UE either does not report RI (Alt 1.15)or reports a 2-bit RI indicating values from {1, 2, 3, 4} (Alt 1.16).And if the configured values of RA size=2 that corresponds to RI=S2,then the UE reports a 3-bit RI indicating values from S={(1, 2), (1, 3),(1, 4), (2, 2), (3, 3), (4, 4)}, where a pair (a, b) in set S indicatesreported RI=a and reported remaining CSI (PMI and CQI) corresponding tothe configured RI=b.

In a variation of this scheme, the value of RI is configuredsemi-statically via higher layer RRC signaling or more dynamic MAC CEbased signaling.

In one embodiment of Scheme 1B-6, Scheme 1B-4 in which layer numberslayer 0, layers 1 . . . and so on are replaced with their RA sizenumbers RA size 0, RA size 1 . . . and so on.

In one embodiment of Scheme 1B-7, the UE interprets the modulation andcoding scheme (MCS) field in UL-related DCI for the purpose of UCItransmission differently depending on the value of RI reported by theUE. There is no additional gNB signaling involved, and RA for UCItransmission is fixed regardless of the reported RI value.

The UE interprets the configured MCS field as MCS value=X for one RIvalue (e.g. RI=1) and as MCS value=Y for another RI value (e.g. RI=2),where the value Y is such that at least one of modulation and codingrate is different from that corresponding to MCS value=X. For example,the MCS value=X corresponds to RI=1, and the MCS value Y=K*X correspondsto RI=2, where K is a constant. At least one of the followingalternatives is used for K.

In one example of Alt1.17, K is configurable either semi-statically (viaRRC, higher layer signaling), or more dynamically (via MAC CE based orDCI signaling). This configuration is either explicit via a RRCparameter signaling the value of K, or implicit via at least one of theType II CSI codebook parameters such as parameter to set the value forL, resolution for phase reporting, and SB amplitude reporting.

In one example of Alt1.18, K is pre-defined in the specification, e.g.K=½, or ⅓.

In one example of Alt1.19, K is determined implicitly depending on, e.g.frequency granularity (“wideband, or partial band, or subband” or “onereport for all subbands or one report per subband”) of CQI and/or PMI.TABLE 2 shows an example.

TABLE 2 K values Frequency granularity for PMI K Wideband 1 Partial band1 Subband ½

For example, the MCS value=X corresponds to RI=1, and the MCS valueY=X−K corresponds to RI=2, where K is a constant. At least one of thefollowing alternatives is used for K.

In one example of Alt1.20, K is configurable either semi-statically (viaRRC, higher layer signaling), or more dynamically (via MAC CE based orDCI signaling). This configuration is either explicit via a RRCparameter signaling the value of K, or implicit via at least one of theType II CSI codebook parameters such as parameter to set the value forL, resolution for phase reporting, and SB amplitude reporting.

In one exempla of Alt1.21, K is pre-defined in the specification, e.g.K=└X/2┘, or └X/3┘.

In one example of Alt1.22, K is determined implicitly depending on, e.g.frequency granularity (“wideband, or partial band, or subband” or “onereport for all subbands or one report per subband”) of CQI and/or PMI.TABLE 3 shows an example.

TABLE 3 K values Frequency granularity for PMI K Wideband 1 Partial band1 Subband └X/2┘

In one embodiment of Scheme 1B-8, the UE (and later gNB upon receivingthe A-CSI report) interprets both MCS field and RA field in UL-relatedDCI for the purpose of UCI transmission differently depending on thevalue of RI reported by the UE. There is no additional gNB signalinginvolved. The UE interprets the configured MCS field as MCS value=X andRA=M PRBs for one RI value (e.g. RI=1) and as MCS value=Y and RA=N PRBsfor another RI value (e.g. RI=2), where the value Y is such that atleast one of modulation and coding rate is different from thatcorresponding to MCS value=X. For example, the MCS value=X and RA=M PRBscorrespond to RI=1, and the MCS value Y=K1*X (or =X−K1) and RA=K2*N PRBscorrespond to RI=2, where K1 and K2 are constant. The value K1 isaccording to at least one of alternatives in Scheme 1B-8 and the valueK2 is according to at least one of alternatives in Scheme 1B-1.

In one embodiment of Scheme 1B-9, the UE performs rate matching (RM) tothe UCI. Based on the indicated RA or/and MCS, RM is performed on thesecond part if the UCI payload is smaller or exceeds that accommodatedby the indicated RA/MCS. Note that in this case, the condition toaddress different payloads for RI=1 and RI=2 is not based on RI(configured or reported), but based on the total UCI payload. At leastone of the following two alternatives for RM is used.

In one example of Alt1.23, RM is performed using typical channel codingprocedure (for, e.g. polar code), i.e. puncturing the parity bits first,and if needed, systematic bits later.

In one example of Alt1.24, RM is performed by puncturing some UCI bitsbased on a certain ordering, e.g. PMI first, then CQI.

Note that the gNB can infer the payload size (hence no blind detectionis needed) doe the second part after decoding the first part.

In some embodiments on Type II CSI reporting, the PMI comprises a first(WB) PMI i₁ and a second (SB) PMI i₂. The first PMI i₁=[i_(1,1),i_(1,2), i_(1,3), i_(1,4)] comprises two layer-common (i.e., reportedcommon for two layers if a UE reports RI=2) components: orthogonal basisset (indicated using index i_(1,1) indicating the rotation factors (q₁,q₂) where q₁, q₂∈{(0,1,2,3}); and L beam selection (indicated usingindex i_(1,2)), which is either joint, ┌log₂

^(N) ¹ _(L) ^(N) ²

┐ bits, or independent per beam, L┌log₂(N₁N₂)┐ bits, and twolayer-specific (i.e., reported for each of the two layers if UE reportsRI=2) components: strongest coefficient (indicated using index i_(1,3))and WB amplitudes p_(l,i) ⁽¹⁾ (indicated using index i_(1,4)).

The indices i_(1,3) and i_(1,4) can be expressed further as

$i_{1,3} = \left\{ {{\begin{matrix}\left\lbrack i_{1,3,1} \right\rbrack & {{RI} = 1} \\\begin{bmatrix}i_{1,3,1} & i_{1,3,2}\end{bmatrix} & {{RI} = 2}\end{matrix}\mspace{14mu} {and}\mspace{14mu} i_{1,4}} = \left\{ {\begin{matrix}\left\lbrack i_{1,4,1} \right\rbrack & {{RI} = 1} \\\begin{bmatrix}i_{1,4,1} & i_{1,4,2}\end{bmatrix} & {{RI} = 2}\end{matrix}.} \right.} \right.$

The second PMI i₂=[i_(2,1), i_(2,2)] comprises two layer-specificcomponents: SB phase c_(l,i) indicated using index i_(2,1) and SBamplitude p_(l,i) ⁽²⁾ (which can be turned ON or OFF by RRC signaling)indicated using index i_(2,2), which can expressed as

$i_{2,1} = \left\{ {{\begin{matrix}\left\lbrack i_{2,1,1} \right\rbrack & {{RI} = 1} \\\begin{bmatrix}i_{2,1,1} & i_{2,1,2}\end{bmatrix} & {{RI} = 2}\end{matrix}\mspace{14mu} {and}\mspace{14mu} i_{2,2}} = \left\{ {\begin{matrix}\left\lbrack i_{2,2,1} \right\rbrack & {{RI} = 1} \\\begin{bmatrix}i_{2,2,1} & i_{2,2,2}\end{bmatrix} & {{RI} = 2}\end{matrix}.} \right.} \right.$

Note that i_(1,3,2), i_(1,4,2), i_(2,1,2), and i_(2,1,2) are reportedonly when RI=2 is reported. The subscript l∈{0,1} is used for layers,and the subscript i∈{0, 1, . . . , 2L−1} is used for coefficients. Thefirst PMI is reported in a wideband (WB) manner and the second PMI canbe reported in a wideband or subband (SB) manner.

FIG. 11 illustrates an example two-part UCI design 1100 according toembodiments of the present disclosure. The embodiment of the two-partUCI design 1100 illustrated in FIG. 11 is for illustration only. FIG. 11does not limit the scope of this disclosure to any particularimplementation. As shown in FIG. 11, RI, CQI, and I are combined as Part1 (e.g., UCI part 1) in step 1105. Wideband PMI (i1) and subband PMI(i2) are combined as Part 2 (e.g., UCI part 2) in step 1110. In step1115, the number of bits (P1) in Part 1 and the number of bits (P2) inPart 2 are added to each other. In step 1120, a total number of bits(P=P1+P2) is compared with a number of bits B. If P is greater than B,the UCI part 1 is only transmitted, otherwise, the UCI part 1 and 2 aretransmitted.

In one embodiment of scheme 1B-10, an example of which is illustrated inFIG. 11, for the two-part UCI design where the first part includesinformation such as RI, CQI, and, optionally, an indicator (1) about theWB amplitudes, if the UE finds that the total CSI payload P (the numberof UCI information bits associated with the CSI report) exceeds thenumber of bits (B) that can be accommodated within the PUSCH resourcesfor UCI transmission (either explicitly or implicitly allocated to theUE) or, optionally, exceeds a certain threshold (either fixed orconfigured), the UE transmits only the first UCI part and not the secondUCI part; otherwise the UE transmits both parts. The indicator (1) isaccording to at least one of the following alternatives.

In one example of Alt 1B-10a, (N_(0,1), N_(0,2)), where N_(0,1) andN_(0,2) respectively indicate the number of reported WB amplitudes thatare zero for layer 1 and layer 2 respectively, i.e., p_(l,i) ⁽¹⁾=0; ifRI=1, N_(0,2) is set to fixed value (e.g. 0 or 2L), since PMI for layer2 is not reported.

In one example of Alt 1B-10b, (N_(0,1), N_(0,2)), where N_(0,1) andN_(0,2) respectively indicate the number of reported WB amplitudes thatare non-zero for layer 1 and layer 2 respectively, i.e., p_(l,i) ⁽¹⁾≠0;if RI=1, N_(0,2) is set to fixed value (e.g. 0 or 2L), since PMI forlayer 2 is not reported.

In one example of Alt 1B-10c, N₀ to indicate the total (sum) number ofreported WB amplitudes that are zero, where the total or sum is acrossall layers.

In one example of Alt 1B-10d, N₀ to indicate the total (sum) number ofreported WB amplitudes that are non-zero, where the total or sum isacross all layers.

In one example of Alt 1B-10e, B=B₀B₁ or B₁B₀, where each of bitmapB₀=b_(0,0)b_(0,1) . . . b_(0,2L-1) and bitmap B₁=b_(1,0)b_(1,1) . . . ,b_(1,2L-1) is of length 2L. If a bit b_(i,j)=0, then the correspondingWB amplitude is zero, and if a bit b_(i,j)=1, then the corresponding WBamplitude is non-zero. Alternatively, if a bit b_(i,j)=0, then thecorresponding WB amplitude is non-zero, and if a bit b_(i,j)=1, then thecorresponding WB amplitude is zero; if RI=1, B₁ is fixed (e.g. 00 . . .0), since PMI for layer 2 is not reported.

In a variation of scheme 1B-10, the first part does not include RI, andcomprises CQI and the indicator I. RI is not reported explicitly, butderived using the indicator I.

FIG. 12A illustrates another example two-part UCI design 1200 accordingto embodiments of the present disclosure. The embodiment of the two-partUCI design 1200 illustrated in FIG. 12A is for illustration only. FIG.12A does not limit the scope of this disclosure to any particularimplementation. As shown in FIG. 12A, RI, CQI, and I are combined asPart 1 (e.g., UCI part 1) in step 1205. Wideband PMI (i1) and subbandPMI (i2) are combined as Part 2 (e.g., UCI part 2) in step 1206. In step1207, the number of bits (P1) in Part 1 and the number of bits (P2) inPart 2 are added to each other. In step 1208, a total number of bits(P=P1+P2) is compared with a number of bits B. If P is greater than B,the UCI part 1 and a UCI part 2 after rate matching are transmitted,otherwise, the UCI part 1 and 2 are transmitted. In step 1209, a ratematching operation is performed for the UCI part 2 based on informationfrom the UCI part 2 in step 1206.

In one embodiment of scheme 1B-11, an example of which is illustrated inFIG. 8, for two-part UCI design where the first part includesinformation such as RI, CQI, and, optionally, an indicator (1), if theUE finds that the total CSI payload (the number of UCI information bitsassociated with the CSI report) exceeds the number of bits that can beaccommodated within the PUSCH resources for UCI transmission (eitherexplicitly or implicitly allocated to the UE) or, optionally, exceeds acertain threshold (either fixed or configured), the UE transmits thefirst UCI part as is.

In addition, the UE performs rate matching to the second UCI part. Thiscan be done, for instance, by increasing the channel coding rate, orpartially puncturing or selecting the output of the channel encoder(e.g. Polar encoder), or by adjusting the modulation-coding-scheme (MCS)and/or beta offset factor used by the second UCI part. This ratematching can include no transmission (complete puncturing) as a specialcase, if the payload associated with the second UCI part is too largecompared to a certain threshold. The indicator (1) is according to atleast one of the alternatives in the aforementioned Scheme 1B-10.

In a variation of scheme 1B-11, the first part does not include RI, andcomprises CQI and the indicator I. RI is not reported explicitly, butderived using the indicator I.

In one embodiment of scheme 1B-12, an A-CSI report is encoded separatelyinto multiple encoded parts in a single-slot and the transmissionpriority of each encoded part is different.

In one example, the encoded parts that are used to identify the numberof information bits in other encoded parts of the report have highertransmission priority.

In one example, the higher priority parts are first included in atransmission in their entirety before the lower priority parts areincluded.

In one example, the information bits and/or channel coded bits (with orwithout rate matching as explained in Scheme 1B-11) of a lower prioritypart is partially transmitted or not transmitted if the payload (thenumber bits associated with the lower priority part) exceeds the numberof bits that can be accommodated (after the payload for the higherpriority parts is subtracted out from the maximum that UCI canaccommodate) within the PUSCH resources for UCI transmission (eitherexplicitly or implicitly allocated to the UE). If the lower prioritypart is partially transmitted, then at least one of the followingalternatives is used.

In one example of Alt 1B-12a, the CSI components or parameterscorresponding to at least one subband (SB) is dropped (not transmitted)for the lower priority parts. The CSI for all SBs can be dropped as aspecial case. At least one of the following methods is used.

In one instance of Method 0, a decimation ratio (r) is used; startingfrom SB number 0, the CSI components or parameters corresponding to SBnumber r, SB number 2r, and so on are reported for the lower priorityparts. The decimation factor is either fixed (e.g. 2), or configured(via RRC or MAC CE based or dynamic DCI based signaling).

In one instance of Method 1, a priority pattern is used to order SB CSIfor lower priority parts. The pattern is either fixed (e.g. 2), orconfigured (via RRC or MAC CE based or dynamic DCI based signaling).

In one instance of Method 2, a UE reports the set (indices) of SBs forwhich the CSI is reported for the lower priority parts, and thisreporting is either in the higher priority parts or in the lowerpriority parts. To report the SB indices, the combinatorial numbering asprovided in 2017.08.003.SR0 can be used where the reported SBcombination index is given by

${i = {\sum\limits_{j = 0}^{M - 1}\; \begin{pmatrix}{K - 1 - k_{j}} \\{M - j}\end{pmatrix}}},$

where K is the total number of SBs for which the UE is configured toreport CSI, M is the number of SBs for which lower priority parts aretransmitted partially, and k₀, k₁, . . . k_(M-1) are the indices of Mselected SBs sorted in increasing order of i.

Alternatively, the SB indices are reported using a bitmap B=b₀, b₁, . .. , b_(K-1), where b_(i)=0 indicates that the SB i is not selected forpartial CSI reporting, and b_(i)=1 indicates that the SB i is selectedfor partial CSI reporting, or, b_(i)=1 indicates that the SB i is notselected for partial CSI reporting, and b_(i)=0 indicates that the SB iis selected for partial CSI reporting. In this bitmap, b₀ corresponds tothe least significant bit (LSB) and b_(K-1) corresponds to the mostsignificant bit (MSB). Alternatively, b₀ corresponds to the MSB andb_(K-1) corresponds to the LSB.

In one example of Alt 1B-12b, a subset of CSI components or parametersis dropped (not reported) for all SBs for which the UE is configured toreport the lower priority parts. The subset is either fixed orconfigured (via RRC or MAC CE based or dynamic DCI based signaling) orreported by the UE (e.g. in the higher priority parts).

In one example of Alt 1B-12c, a combination of Alt 1B-12a and Alt1B-12b, wherein a subset of CSI components or parameters is dropped (notreported) for at least one SB for which the UE is configured to reportthe lower priority parts. The subset or/and the at least one SB is/areeither fixed or configured (via RRC or MAC CE based or dynamic DCI basedsignaling).

In one example of Alt 1B-12d, the CSI reported in the higher priorityparts is used to determine the partial transmission of the lowerpriority parts.

In one instance, if the higher priority part includes CQI, then theindices of the SBs for which the UE is configured to report CSI aresorted in the decreasing (or increasing) order of the CQIs, and thelower priority parts are transmitted only for the best M SBs whichcorrespond to the M largest CQI values that are reported in the higherpriority parts. The value M is either fixed (e.g. M=└K/2┘ or ┌K/2┐ whereK is the total number of SBs for which the UE is configured to reportCSI) or configured (e.g. via higher layer RRC signaling) or isdetermined based on the UCI related information such as RA or/and MCS.

When the CQIs, CQI_(x) and CQI_(y), of the two SBs, x and y areidentical (CQI_(x)=CQI_(y)), then the SB with index min(x, y) or max(x,y) is prioritized to be included in the set of the best M SBs.

In another instance, if the higher priority part includes (N_(0,1),N_(0,2)), where N_(0,1) and N_(0,2) as defined in Alt 1B-10b,respectively indicate the number of reported WB amplitudes that arenon-zero for layer 1 and layer 2 respectively, and gNB configures RA forUCI transmission assuming RI=1, which corresponds to M coefficients (SBphase and if configured SB amplitude) reporting in each SB, but the UEwants to report RI=2, then the UE reports M strongest coefficients fromthe total coefficients across both layers and drops (does not report)the remaining weak coefficients (where the strongest coefficients aredetermined based on the reported WB amplitude values for both layers).The number M is divided into two numbers (positive integers), M₁ forlayer 1 and M₂ for layer 2 such that M₁+M₂=M. If N_(0,1) and N_(0,2) donot include the strongest coefficients (which are 1) for layer 1 andlayer 2, and N_(0,1)+N_(0,2)>M, then the weak coefficients are droppedas follows: Layer 1: K₁=M−N_(0,2); report max(M₁, K₁) strongestcoefficients and drop the rest; and Layer 2: K₂=M−N_(0,1); reportmax(M₂, K₂) strongest coefficients and drop the rest

If N_(0,1) and N_(0,2) include the strongest coefficients (which arealways 1) for layer 1 and layer 2, and No, +N_(0,2)−2>M, then the weakcoefficients are dropped as follows: Layer 1: K₁=M−N_(0,2)+1; reportmax(M₁, K₁) strongest coefficients and drop the rest; and Layer 2:K₂=M−N_(0,1)+1; report max(M₂, K₂) strongest coefficients and drop therest.

In an example, M=2L−1, and either M₁=L and M₂=L−1, or, M₁=L−1 and M₂=L.This example can be extended to other alternatives, e.g. Alt 1B-10a, Alt1B-10c, Alt 1B-10d, and Alt 1B-10e.

In another example, which is an extension of the previous example, ifthe higher priority part includes (N_(0,1), N_(0,2)), and gNB configuresRA for UCI transmission assuming RI=1, which corresponds to Mcoefficients (SB phase and if configured SB amplitude) reporting in eachSB, but the UE wants to report RI=2, then the UE reports M strongestcoefficients from the total coefficients across both layers and drops(does not report) the remaining weak coefficients (where the strongestcoefficients are determined based on the reported WB amplitude valuesacross both layers). The information about the M out of all coefficientsfor both layers is signaled either implicitly based on the reported WBamplitude values for two layers, or explicitly in the higher priorityparts.

FIG. 12B illustrates yet another example two-part UCI design 1220according to embodiments of the present disclosure. The embodiment ofthe two-part UCI design 1220 illustrated in FIG. 12B is for illustrationonly. FIG. 12B does not limit the scope of this disclosure to anyparticular implementation. As shown in FIG. 12B, RI, CQI, and I arecombined as Part 1 (e.g., UCI part 1) in step 1221. Wideband PMI (i1)and subband PMI (i2) are combined as Part 2 (e.g., UCI part 2) in step1223. In step 1225, the number of bits (P1) in Part 1 and the number ofbits (P2) in Part 2 are added to each other. In step 1227, a totalnumber of bits (P=P1+P2) is compared with a number of bits B. If P isgreater than B, the UCI part 1 and a partial CSI for the UCI Part 2 aretransmitted, otherwise, the UCI part 1 and 2 are transmitted. In step1209, the partial CSI for the UCI part 2 is determined based oninformation from the UCI part 2 in step 1223.

As an example, as shown in FIG. 12B, the multiple encoded partscorrespond to two parts, part 1 and part 2 (or first part or secondpart) where part 1 corresponds to the higher priority part and part 2corresponds to the lower priority part. The CSI content of two parts isaccording to Scheme 1B-10 or 1B-11, including the variation wherein thefirst part does not include RI, and comprises CQI and the indicator I;RI is not reported explicitly, but derived using the indicator I. Thelower priority part (part 2) is transmitted in full (i.e. all CSIcomponents are transmitted for all SBs) when RI=1 is transmitted in thehigher priority part (part 1), and can be transmitted partially(according to at least one of Alt 1B-12a, 12b, 12c, or 12d) or nottransmitted when RI=2 is transmitted in the higher priority part (part1).

The CQI reporting in the higher priority part (part 1) is according toat least one of the following alternatives.

In one example of Alt 1B-12X, the CQI transmission is unaffected(independent) by whether the lower priority part (part 2) is transmittedin full or partially or not transmitted.

In one example of Alt 1B-12Y, the CQI transmission depends on the lowerpriority part (part 2). For example, when the part 2 is transmittedpartially (according to at least one of Alt 1B-12a, 12b, 12c, or 12d),the CQI is also transmitted partially depending on the alternative forpartial part 2 transmission. In such example, when Alt 1B-12a is usedfor partial part 2 transmission, the CQI is transmitted only for the SBsfor which part 2 CSI is transmitted. In such example, when Alt 1B-12b isused for partial part 2 transmission, the CQI is transmitted for all SBsaccording to the set of part 2 CSI parameters/components that aretransmitted.

The information whether the lower priority parts (e.g. part 2) arereported (A) fully for all SBs or (B) partially for a subset of SBs or(C) dropped (not reported) for all SBs is determined according to atleast one of the following alternatives.

In one alternative, the information whether the lower priority parts(e.g. part 2) are reported according to (A), or (B), or (C) isdetermined based on a predefined condition, and hence does not requireany additional configuration/reporting.

In one example, the predefined condition can be based on the UCI relatedinformation (e.g. RA or/and MCS) in the DL-related DCI (or UL-relayedDCI). For instance, if RA assumes RI=1, then if the UE wants to reportRI=1, then the lower priority parts are reported fully, and if the UEwants to report RI=2, then the lower priority parts are reportedpartially or dropped.

In another example, if the number of UCI symbols exceeds the number ofavailable symbols given in the RA (or exceeds a particular fraction ofthe number of available symbols given in the RA), then (B) partialtransmission is performed, otherwise (A) full transmission is performed.

In such example, the fraction can be fixed (predefined) or configured(from a set of values) via either higher layer RRC or dynamic DCI basedsignaling.

In such example, the number of UCI symbols is determined from the MCS(indicated in the UL-related DCI) and beta offset (either indicated inthe UL-related DCI or configured via higher-layer signaling). Forexample, at least when CSI is multiplexed with UL-SCH on PUSCH: lowerpriority (part 2) information bits are transmitted fully (A) if UCI coderate is below threshold c_(T); lower priority (part 2) information bitsare transmitted partially (e.g. lower priority bits are omitted for asubset of SBs as explained in some embodiments of the presentdisclosure) until UCI code rate is below c_(T); and an example ofthreshold is

${c_{T} = \frac{c_{MCS}}{\beta_{offset}^{{CSI} - 2}}},$

where c_(MCS) is the code rate for PUSCH given from the MCS field forCSI part 2, and β_(offset) ^(CSI-2) is the associated beta offset forCSI part 2.

In another example, if the number of UCI symbols exceeds the number ofavailable symbols given in the RA (or exceeds a particular fraction ofthe number of available symbols given in the RA), then (C) the lowerpriority parts are dropped, otherwise (A) full transmission isperformed.

In another alternative, the information whether the lower priority parts(e.g. part 2) are reported according to (A), or (B), or (C) isindicated/configured via DL-related DCI (or UL-relayed DCI).

In one example, this indication is based on a 1-bit DCI field whichindicates (A) full reporting or (B) partial reporting.

In another example, this indication is based on a 1-bit DCI field whichindicates (A) full reporting or (C) dropping.

In yet another example, this indication is based on a 1-bit DCI fieldwhich indicates (B) partial reporting or (C) dropping

In yet another example, this indication is based on a 2-bit DCI fieldwhich indicates (A) full reporting or (B) partial reporting or (C)dropping.

In yet another example, this indication is based on a 2-bit DCI fieldwhich indicates (A) full reporting or (B1) partial reporting 1 or (B2)partial reporting 2 or (C) dropping, where (B1) partial reporting 1corresponds to the case in which the lower priority parts are reportedpartially for a subset S1 of SBs, and where (B2) partial reporting 2corresponds to the case in which the lower priority parts are reportedpartially for a subset S2 of SBs, and S1 and S2 differ in at least oneSB.

In another alternative, the information whether the lower priority parts(e.g. part 2) are reported according to (A), or (B), or (C) is reportedby the UE as a part of the CSI report. For example, the higher priorityparts (e.g. part 1) can include a 1 or 2-bit indication, and once gNBdecodes the higher priority parts (e.g. part 1), the gNB knows about theinformation about transmission of the lower priority parts (e.g. part2).

In one example, this indication in the higher priority parts (e.g.part 1) is 1-bit which indicates (A) full reporting or (B) partialreporting.

In another example, this indication in the higher priority parts (e.g.part 1) is 1-bit which indicates (A) full reporting or (C) dropping.

In yet another example, this indication in the higher priority parts(e.g. part 1) is 1-bit which indicates (B) partial reporting or (C)dropping

In yet another example, this indication in the higher priority parts(e.g. part 1) is 2-bit which indicates (A) full reporting or (B) partialreporting or (C) dropping.

In yet another example, this indication in the higher priority parts(e.g. part 1) is 2-bit which indicates (A) full reporting or (B1)partial reporting 1 or (B2) partial reporting 2 or (C) dropping, where(B1) partial reporting 1 corresponds to the case in which the lowerpriority parts are reported partially for a subset S1 of SBs, and where(B2) partial reporting 2 corresponds to the case in which the lowerpriority parts are reported partially for a subset S2 of SBs, and S1 andS2 differ in at least one SB.

In one embodiment 1X, scheme 1B-10 of embodiment 1 is extended togeneral two-part UCI design including the cases of single componentcarrier (CC) or multiple CCs when carrier aggregation (CA) isconfigured. In particular, the UCI comprises two parts, a first UCI partfor a first CSI part and a second UCI parts for a second CSI parts,where CSI corresponds to one CC or multiple CCs. If the UE finds thatthe total CSI payload P (the number of UCI information bits associatedwith the CSI report) exceeds the number of bits (B) that can beaccommodated within the PUSCH resources for UCI transmission (eitherexplicitly or implicitly allocated to the UE) or, optionally, exceeds acertain threshold (either fixed or configured), the UE transmits onlythe first UCI part and not the second UCI part; otherwise the UEtransmits both parts.

In one embodiment 1Y, scheme 1B-11 of embodiment 1 is extended togeneral two-part UCI design including the cases of single componentcarrier (CC) or multiple CCs when carrier aggregation (CA) isconfigured. In particular, the UCI comprises two parts, a first UCI partfor a first CSI part and a second UCI parts for a second CSI parts,where CSI corresponds to one CC or multiple CCs.

If the UE finds that the total CSI payload (the number of UCIinformation bits associated with the CSI report) exceeds the number ofbits that can be accommodated within the PUSCH resources for UCItransmission (either explicitly or implicitly allocated to the UE) or,optionally, exceeds a certain threshold (either fixed or configured),the UE transmits the first UCI part as is. In addition, the UE performsrate matching to the second UCI part. This can be done, for instance, byincreasing the channel coding rate, or partially puncturing or selectingthe output of the channel encoder (e.g. Polar encoder), or by adjustingthe modulation-coding-scheme (MCS) and/or beta offset factor used by thesecond UCI part. This rate matching can include no transmission(complete puncturing) as a special case, if the payload associated withthe second UCI part is too large compared to a certain threshold.

In one embodiment 1Z, scheme 1B-12 of embodiment 1 is extended togeneral two-part UCI design including the cases of single componentcarrier (CC) or multiple CCs when carrier aggregation (CA) isconfigured. In particular, the UCI comprises two parts, a first UCI partfor a first CSI part and a second UCI parts for a second CSI parts,where CSI corresponds to one CC or multiple CCs. If the UE finds thatthe total CSI payload (the number of UCI information bits associatedwith the CSI report) exceeds the number of bits that can be accommodatedwithin the PUSCH resources for UCI transmission (either explicitly orimplicitly allocated to the UE) or, optionally, exceeds a certainthreshold (either fixed or configured), the UE transmits the first UCIpart as is.

In addition, the UE either transmits the second UCI part partially(based on at least one of the alternatives in scheme 1B-12) or drops thesecond UCI part (hence does not report the second UCI part). Theinformation whether the second UCI part is reported (A) fully for allSBs or (B) partially for a subset of SBs or (C) dropped (not reported)for all SBs is determined according to at least one of the alternativesin scheme 1B-12.

FIG. 12C illustrates yet another example two-part UCI design 1240according to embodiments of the present disclosure. The embodiment ofthe two-part UCI design 1240 illustrated in FIG. 12C is for illustrationonly. FIG. 12C does not limit the scope of this disclosure to anyparticular implementation. As shown in FIG. 12C, K≥1 reports in step1241 is partitioned and transmitted to step 1242 and step 1243. In step1242, for example RI, CQI, and I are combined, and wideband PMI (i1) andsubband PMI (i2) are combined in step 1243. In step 1244, the number ofbits (P1) in Part 1 and the number of bits (P2) in Part 2 are added toeach other. In step 1245, a total number of bits (P=P1+P2) is comparedwith a number of bits B. If P is greater than B, the UCI part 1 and apartial CSI for the UCI part 2 are transmitted, otherwise, the UCI part1 and 2 are transmitted. In step 1246, the partial CSI for the UCI part2 is determined based on information from the UCI part 2 in step 1223.

The information whether the second UCI part is reported (A) fully forall SBs or (B) partially for a subset of SBs or (C) dropped (notreported) for all SBs is determined according to at least one of thealternatives in scheme 1B-12.

In a variation of embodiment 1Z, as shown in FIG. 12C, the two-part UCIdesign for K≥1 CSI reports (e.g. CSI reports for K CCs or cells) is asfollows. The UCI for CSI report i∈{0, 1, . . . , K−1} comprises twoparts, a UCI part 1 (U_(i,1)) for a CSI part 1 (comprising for exampleRI, CQI, and indicator I) and a UCI part 2 (U_(i,2)) for a CSI part 2(comprising for example, WB PMI i₁ and SB PMI i₂).

If the UE finds that the total CSI payload, i.e., the number of UCIinformation bits associated with the K CSI reports (e.g. CSI reports forK CCs or cells), P₁+P₂=Σ_(i=0) ^(K-1)(U_(i,1)+U_(i,2)), exceeds thenumber of bits (B) that can be accommodated within the PUSCH resourcesfor UCI transmission (either explicitly or implicitly allocated to theUE, e.g., based on the MCS, beta offsets, and RA) or, optionally,exceeds a certain threshold (either fixed or configured), the UEtransmits the UCI part 1 for K CSI reports (e.g. CSI reports for K CCsor cells) as is, which consumes P₁=_(i=0) ^(K-1)U_(i,1) bits. Inaddition, the UE transmits the UCI part 2 for K CSI reports (e.g. CSIreports for K CCs or cells) partially.

FIG. 13 illustrates an example transmission priority 1300 according toembodiments of the present disclosure. The embodiment of thetransmission priority 1300 illustrated in FIG. 13 is for illustrationonly. FIG. 13 does not limit the scope of this disclosure to anyparticular implementation.

An example of partial UCI part 2 transmission is shown in FIG. 13wherein the entire UCI part 2 bits (e.g. information bits or channelcoding bits) are partitioned into several parts Q₀, Q₁, Q₂, . . . , andthe priority for UCI transmission is according to the index i of the UCIpart Q_(i). For example, as shown, the UCI part Q₀ has the highestpriority for transmission, and the priority decreases as the index iincreases. An example (Alt 1Z-0) is also shown in FIG. 13, which isexplained later.

If the UCI part 2 comprises both WB and SB CSI components, then at leastone of the following alternatives is used for the partial transmissionof the UCI part 2 for K CSI reports. In these alternatives, it isassumed that SBs are indexed as 0, 1, and 2 and so on.

In one embodiment of Alt 1Z-0, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into fourparts, Q₀, Q₁, Q₂, Q₃, where Q₀ corresponds to the most-significant(MSB) bits and Q₃ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₃ corresponds to the MSB bits. In oneexample, Q₀ comprises WB CSI for all K CSI reports (e.g. CSI reports forK CCs or cells). In one example, Q₁ comprises SB CSI for allodd-numbered SBs (1, 3, . . . ) for the first (i=0) CSI report. In oneexample, Q₂ comprises SB CSI for all even-numbered SBs (0, 2, . . . )for the first (i=0) CSI report. In one example, Q₃ comprises SB CSI forall SBs for remaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSI reportsfor K−1 CCs or cells).

The priority rule or order for the transmission of these parts isaccording to the increasing order of the index i of these parts, i.e.,Q₀→Q₁→Q₂→Q₃, where Q₀ has the highest priority for UCI transmission, Q₁is next in priority for UCI transmission, followed by Q₂, and Q₃ has theleast priority. In other words, if P₂=Σ_(i=0) ³Q_(i) exceeds B−P₁, then,Q₃ is dropped (not transmitted) first, and if the remaining UCI bitsP₂−Q₃=Q still exceeds B−P₁, then Q₂ and Q₃ are dropped (nottransmitted), and the dropping in this order continues. Note that ifB−P₁<Q₀, then the entire UCI part 2 is not transmitted, otherwise atleast Q₀ is transmitted.

In a variation of this alternative (Alt 1Z-0), the priority order ofodd-numbered SBs and even-numbered SBs is reversed, i.e., In oneexample, Q₁ comprises SB CSI for all even-numbered SBs (0, 2, . . . )for the first (i=0) CSI report. In one example, Q₂ comprises SB CSI forall odd-numbered SBs (1, 3, . . . ) for the first (i=0) CSI report.

In one embodiment of Alt 1Z-1, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into threeparts, Q₀, Q₁, Q₂, where Q₀ corresponds to the most-significant (MSB)bits and Q₂ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₂ corresponds to the MSB bits. In oneexample, Q₀ comprises the following two sub-parts: WB CSI for the first(i=0) CSI report; and SB CSI for all odd-numbered SBs (1, 3, . . . ) forthe first (i=0) CSI report. In one example, Q₁ comprises SB CSI for alleven-numbered SBs (0, 2, . . . ) for the first (i=0) CSI report. In oneexample, Q₂ comprises the following two sub-parts: WB CSI for remaining,i=1, 2 . . . , K−1, CSI reports (e.g. CSI reports for K−1 CCs or cells);and SB CSI for all SBs for remaining, i=1, 2 . . . , K−1, CSI reports(e.g. CSI reports for K−1 CCs or cells).

The priority rule or order for the transmission of these parts isaccording to the increasing order of the index i of these parts, i.e.,Q₀→Q₁→Q₂, where Q₀ has the highest priority for UCI transmission, Q₁ isnext in priority for UCI transmission, and Q₂ has the least priority. Inother words, if P₂=Σ_(i=0) ²Q_(i) exceeds B−P₁, then, Q₂ is dropped (nottransmitted) first, and if the remaining UCI bits P₂−Q₂=Σ_(i=0) ¹Q_(i)still exceeds B−P₁, then Q₁ and Q₂ are dropped (not transmitted), andthe dropping in this order continues. Note that if B−P₁<Q₀, then theentire UCI part 2 is not transmitted, otherwise at least Q₀ istransmitted.

In a variation of this alternative (Alt 1Z-1), the priority order ofodd-numbered SBs and even-numbered SBs for the first CSI report (i=0) isreversed, i.e., in one example, Q₀ comprises the following two sub-partscomprises: WB CSI for the first (i=0) CSI report; and SB CSI for alleven-numbered SBs (0, 2, . . . ) for the first (i=0) CSI report. In oneexample, Q₁ comprises SB CSI for all odd-numbered SBs (1, 3, . . . ) forthe first (i=0) CSI report.

In one embodiment of Alt 1Z-2, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into fourparts, Q₀, Q₁, Q₂, Q₃, where Q₀ corresponds to the most-significant(MSB) bits and Q₃ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₃ corresponds to the MSB bits.

In one example, Q₀ comprises the following two sub-parts: WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells); and SB CSI for oneSB (e.g. SB index 0) and for all K CSI reports (e.g. CSI reports for KCCs or cells). In one example, Q₁ comprises SB CSI for all odd-numberedSBs (1, 3, . . . ) for the first (i=0) CSI report. In one example, Q₂comprises SB CSI for all remaining even-numbered SBs (2, 4, . . . ) forthe first (i=0) CSI report. In one example, Q₃ comprises SB CSI forremaining SBs (1, 2, . . . ) and for remaining, i=1, 2 . . . , K−1, CSIreports (e.g. CSI reports for K−1 CCs or cells).

The priority rule or order for the transmission of these parts is asexplained in Alt 1Z-0.

In a variation of this alternative (Alt 1Z-2), the priority order ofodd-numbered SBs and even-numbered SBs is reversed, i.e., In one exampleQ₁ comprises SB CSI for all even-numbered SBs (2, 4, . . . ) for thefirst (i=0) CSI report. In one example, Q₂ comprises SB CSI for allodd-numbered SBs (1, 3, . . . ) for the first (i=0) CSI report.

In one embodiment of Alt 1Z-3, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into threeparts, Q₀, Q₁, Q₂, where Q₀ corresponds to the most-significant (MSB)bits and Q₂ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₂ corresponds to the MSB bits.

In one example, Q₀ comprises the following two sub-parts: WB CSI for allK CSI reports (e.g. CSI reports for K CCs r cells); and SB CSI for allodd-numbered SBs (1, 3, . . . ) and for all K CSI reports (e.g. CSIreports for K CCs or cells).

In one example, Q₁ comprises SB CSI for all even-numbered SBs (0, 2, . .. ) for the first (i=0) CSI report. In one example, Q₂ comprises SB CSIfor all even-numbered SBs (0, 2, . . . ) for remaining, i=1, 2 . . . ,K−1, CSI reports (e.g. CSI reports for K−1 CCs or cells).

The priority rule or order for the transmission of these parts is asexplained in Alt 1Z-1.

In a variation of this alternative (Alt 1Z-3), the priority order ofodd-numbered SBs and even-numbered SBs is reversed, i.e., In oneexample, Q₀ comprises the following two sub-parts: WB CSI for all K CSIreports (e.g. CSI reports for K CCs or cells); and SB CSI for alleven-numbered SBs (0, 2, . . . ) and for all K CSI reports (e.g. CSIreports for K CCs or cells). In one example, Q₁ comprises SB CSI for allodd-numbered SBs (1, 3, . . . ) for the first (i=0) CSI report. In oneexample, Q₂ comprises SB CSI for all odd-numbered SBs (1, 3, . . . ) forremaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSI reports for K−1 CCsor cells).

In one embodiment of Alt 1Z-4, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into 2K+1parts, Q₀, Q₁, Q₂ . . . . Q_(2K), where Q₀ corresponds to themost-significant (MSB) bits and Q_(2K) corresponds to the leastsignificant (LSB) bits, or Q₀ corresponds to LSB bits and Q_(2K)corresponds to the MSB bits.

In one example, Q₀ comprises WB CSI for all K CSI reports (e.g. CSIreports for K CCs or cells). For each CSI report, i=0, 1, . . . K−1,Q_(2i+1) comprises SB CSI for all odd-numbered SBs (1, 3, . . . ) forthe i-th CSI report: and Q₂(i+1) comprises SB CSI for all even-numberedSBs (0, 2, . . . ) for the i-th CSI report.

The priority rule or order for the transmission of these parts isaccording to the increasing order of the index i of these parts, i.e.,Q₀→Q₁→ . . . →Q_(2K), where Q₀ has the highest priority for UCItransmission, Q₁ is next in priority for UCI transmission, . . . , andQ_(2K) has the least priority. In other words, if P₂=Σ_(i=0) ^(2K)Q_(i)exceeds B−P₁, then, Q_(2K) is dropped (not transmitted) first, and ifthe remaining UCI bits P₂−Q_(2K)=Σ_(i=0) ^(2K-1)Q_(i) still exceedsB−P₁, then Q₂K−₁ and Q_(2K) are dropped (not transmitted), and thedropping in this order continues. Note that if B−P₁<Q₀, then the entireUCI part 2 is not transmitted, otherwise at least Q₀ is transmitted.

In a variation of this alternative (Alt 1Z-4), the priority order ofodd-numbered SBs and even-numbered SBs is reversed, i.e. In one example,Q_(2i+1) comprises SB CSI for all even-numbered SBs (0, 2, . . . ) forthe i-th CSI report. In one example, Q_(2(i+1)) comprises SB CSI for allodd-numbered SBs (1, 3, . . . ) for the i-th CSI report.

In one embodiment of Alt 1Z-5, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into 2K parts,Q₀, Q₁, . . . , Q₂K−₁, where Q₀ corresponds to the most-significant(MSB) bits and Q_(2K-1) corresponds to the least significant (LSB) bits,or Q₀ corresponds to LSB bits and Q_(2K-1) corresponds to the MSB bits.

For each CSI report, i=0, 1, . . . K−1: Q_(2i) comprises the followingtwo sub-parts WB CSI for the i-th CSI report and SB CSI for allodd-numbered SBs (1, 3, . . . ) for the i-th CSI report; and Q_(2i+1)comprises SB CSI for all even-numbered SBs (0, 2, . . . or) for the i-thCSI report.

The priority rule or order for the transmission of these parts isaccording to the increasing order of the index i of these parts, i.e.,Q₀→Q₁→ . . . →Q_(2K−1), where Q₀ has the highest priority for UCItransmission, Q₁ is next in priority for UCI transmission, and Q_(2K-1)has the least priority. In other words, if P₂=Σ_(i=0) ^(2K-1)Q_(i)exceeds B−P₁, then, Q_(2K-1) is dropped (not transmitted) first, and ifthe remaining UCI bits P₂−Q_(2K−1)=Σ_(i=0) ^(2K-2)Q_(i) still exceedsB−P₁, then Q_(2K-2) and Q_(2K-1) are dropped (not transmitted), and thedropping in this order continues. Note that if B−P₁<Q₀, then the entireUCI part 2 is not transmitted, otherwise at least Q₀ is transmitted.

In a variation of this alternative (Alt 1Z-5), the priority order ofodd-numbered SBs and even-numbered SBs for the first CSI report (i=0) isreversed, i.e.,

For each CSI report, i=0, 1, . . . K−1: Q₂i comprises the following twosub-parts WB CSI for the i-th CSI report and SB CSI for alleven-numbered SBs (0, 2, . . . ) for the i-th CSI report; and Q_(2i+1)comprises SB CSI for all odd-numbered SBs (1, 3, . . . ) for the i-thCSI report.

In one embodiment of Alt 1Z-6, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned 2K+1 parts, Q₀,Q₁, . . . . Q_(2K), where Q₀ corresponds to the most-significant (MSB)bits and Q_(2K) corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q_(2K) corresponds to the MSB bits. In oneexample, Q₀ comprises the following two sub-parts: WB CSI for all K CSIreports (e.g. CSI reports for K CCs or cells); and SB CSI for one SB(e.g. SB index 0) and for all K CSI reports (e.g. CSI reports for K CCsor cells).

For each CSI report, i=0, 1, . . . K−1, Q_(2i+1) comprises SB CSI forall odd-numbered SBs (1, 3, . . . ) for the i-th CSI report; andQ_(2(i+1)) comprises SB CSI for remaining even-numbered SBs (2, 4, . . .) for the i-th CSI report.

The priority rule or order for the transmission of these parts is asexplained in Alt 1Z-4.

In a variation of this alternative (Alt 1Z-6), the priority order ofodd-numbered SBs and even-numbered SBs is reversed, i.e. In one example,Q_(2i+1) comprises SB CSI for remaining even-numbered SBs (2, 4, . . . )for the i-th CSI report. In one example, Q_(2(i+1)) comprises SB CSI forall odd-numbered SBs (1, 3, . . . ) for the i-th CSI report.

In on embodiment of Alt 1Z-7, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into K parts,Q₀, Q₁, . . . , Q_(2K-1), where Q₀ corresponds to the most-significant(MSB) bits and Q_(K-1) corresponds to the least significant (LSB) bits,or Q₀ corresponds to LSB bits and Q_(K-1) corresponds to the MSB bits.In one example, Q₀ comprises the following two sub-parts: WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells); and SB CSI for allodd-numbered SBs (1, 3, . . . ) and for all K CSI reports (e.g. CSIreports for K CCs or cells).

For each CSI report, i=0, 1, . . . K−1, Q_(i+1) comprises SB CSI for alleven-numbered SBs (0, 2, . . . or) for the i-th CSI report.

The priority rule or order for the transmission of these parts is asexplained in Alt 1Z-1.

In a variation of this alternative (Alt 1Z-7), the priority order ofodd-numbered SBs and even-numbered SBs is reversed, i.e., in oneexample, Q₀ comprises the following two sub-parts: WB CSI for all K CSIreports (e.g. CSI reports for K CCs or cells); and SB CSI for alleven-numbered SBs and for all K CSI reports (e.g. CSI reports for K CCsor cells).

For each CSI report, i=0, 1, . . . K−1, Q_(i+1) comprises SB CSI for allodd-numbered SBs for the i-th CSI report.

In one embodiment of Alt 1Z-8, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into two parts,Q₀, Q₁, where Q₀ corresponds to the most-significant (MSB) bits and Q₁corresponds to the least significant (LSB) bits, or Q₀ corresponds toLSB bits and Q₁ corresponds to the MSB bits. In one example, Q₀comprises WB CSI for all K CSI reports (e.g. CSI reports for K CCs orcells). In one example, Q₁ comprises SB CSI for all SBs and for all KCSI reports.

The priority rule or order for the transmission of these parts is asexplained in earlier alternatives. i.e., Q₀ has higher priority for UCItransmission compared to Q₁. In other words, if P₂=Σ_(i=0) ¹Q_(i)exceeds B−P₁, then, Q₁ is dropped (not transmitted) first, and if theremaining UCI bits P₂−Q₁=Q₀ still exceeds B−P₁, then both Q₀ and Q₁ aredropped (not transmitted), hence the entire UCI part 2 is nottransmitted.

In one embodiment of Alt 1Z-9, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into threeparts, Q₀, Q₁, Q₂, where Q₀ corresponds to the most-significant (MSB)bits and Q₂ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₂ corresponds to the MSB bits. In oneexample, Q₀ comprises WB CSI for all K CSI reports (e.g. CSI reports forK CCs or cells). In one example, Q₁ comprises SB CSI for a subset of SBindices S and for all K CSI reports where the set S is fixed. In oneexample, Q₂ comprises SB CSI for remaining SBs (all SBs except those inthe set S) and for all K CSI reports.

Two examples of the set S are S={0} and S={1}. The priority rule ororder for the transmission of these parts is as explained in earlieralternatives.

In one embodiment of Alt 1Z-10, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into M+1 parts,Q₀, Q₁, . . . , Q_(M), where M is the number of SBs, Q₀ corresponds tothe most-significant (MSB) bits and Q_(M) corresponds to the leastsignificant (LSB) bits, or Q₀ corresponds to LSB bits and Q_(M)corresponds to the MSB bits. In one example, Q₀ comprises WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells).

For each SB index, j=0, 1, . . . M−1, Q_(j+1) comprises SB CSI for SBindex j and for all K CSI reports.

The priority rule or order for the transmission of these parts is asexplained in earlier alternatives. Note that in this alternative, it isassumed that the number of SBs for all CSI reports is the same. If it isdifferent for different CSI repots, then M is maximum of the number ofSBs for all CSI reports, and for a SB index j∈{(0, 1, . . . , M−1}, anda CSI report index i E {(0, 1, . . . , K−1}, there is no CSI to report,then the corresponding report is skipped (not reported) in that partQ_(j+1).

In one embodiment of Alt 1Z-11, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into M+1 parts,Q₀, Q₁, . . . , Q_(M), where M is the number of SBs, Q₀ corresponds tothe most-significant (MSB) bits and Q_(M) corresponds to the leastsignificant (LSB) bits, or Q₀ corresponds to LSB bits and Q_(M)corresponds to the MSB bits. In one example, Q₀ comprises WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells).

For each even-numbered SB index,

${j = 0},,{\ldots \mspace{14mu} \text{:}\mspace{14mu} Q_{\frac{j}{2} + 1}}$

comprises SB CSI for even-numbered SB index j and for all K CSI reports.For each odd-numbered SB index,

${j = 1},3,\ldots \mspace{14mu},Q_{{\lceil\frac{M}{2}\rceil} + \frac{j}{2} + 1}$

comprises SB CSI for odd-numbered SB index j and for all K CSI reports.The rest of details are the same as in Alt 1Z-10.

In one embodiment of Alt 1Z-12, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into M+1 parts,Q₀, Q₁, . . . , Q_(M), where M is the number of SBs, Q₀ corresponds tothe most-significant (MSB) bits and Q_(M) corresponds to the leastsignificant (LSB) bits, or Q₀ corresponds to LSB bits and Q_(M)corresponds to the MSB bits. In one example, Q₀ comprises WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells).

For each odd-numbered SB index,

${j = 1},3,\ldots \mspace{14mu},Q_{\frac{j + 1}{2}}$

comprises SB CSI for odd-numbered SB index j and for all K CSI reports.For each even-numbered SB index,

${j = 0},2,\ldots \mspace{14mu},Q_{{\lfloor\frac{M}{2}\rfloor} + \frac{j}{2} + 1}$

comprises SB CSI for even-numbered SB index j and for all K CSI reports.The rest of details are the same as in Alt 1Z-10.

In one embodiment of Alt 1Z-13, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into M+1 parts,Q₀, Q₁, . . . , Q_(M), where M is the number of SBs, Q₀ corresponds tothe most-significant (MSB) bits and Q_(M) corresponds to the leastsignificant (LSB) bits, or Q₀ corresponds to LSB bits and Q_(M)corresponds to the MSB bits. In one example, Q₀ comprises WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells). For index, j=0, 2,. . . , Q_(j) comprises SB CSI for odd-numbered SB index j+1 and for allK CSI reports; and Q_(j+1) comprises SB CSI for even-numbered SB index jand for all K CSI reports. The rest of details are the same as in Alt1Z-10.

In Alt 1Z-14, the UCI part 2 bits (e.g. CSI bits or information bits orchannel coding bits) are partitioned into M+1 parts, Q₀, Q₁, . . . ,Q_(M), where M is the number of SBs, Q₀ corresponds to themost-significant (MSB) bits and Q_(M) corresponds to the leastsignificant (LSB) bits, or Q₀ corresponds to LSB bits and Q_(M)corresponds to the MSB bits. In one example, Q₀ comprises WB CSI for allK CSI reports (e.g. CSI reports for K CCs or cells). For index, j=0, 2,. . . , Q_(j) comprises SB CSI for even-numbered SB index j and for allK CSI reports; and Q_(j+1) comprises SB CSI for odd-numbered SB indexj+1 and for all K CSI reports. The rest of details are the same as inAlt 1Z-10.

In one embodiment of Alt 1Z-15, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into threeparts, Q₀, Q₁, Q₂, where Q₀ corresponds to the most-significant (MSB)bits and Q₂ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₂ corresponds to the MSB bits. In oneexample, Q₀ comprises WB CSI for all K CSI reports (e.g. CSI reports forK CCs or cells). In one example, Q₁ comprises SB CSI for allodd-numbered SBs (1, 3, . . . ) for the first (i=0) CSI report. In oneexample, Q₂ comprises the following two sub-parts: SB CSI for alleven-numbered SBs (0, 2, . . . ) for the first (i=0) CSI report; and SBCSI for all SBs for remaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSIreports for K−1 CCs or cells). The priority rule or order for thetransmission of these parts is as explained in Alt 1Z-1.

In a variation of this alternative (Alt 1Z-15), the priority order ofodd-numbered SBs and even-numbered SBs for the first (i=0) CSI report isreversed, i.e., Q₁ and Q₂ are as follows. In one example, Q_(Z)comprises SB CSI for all even-numbered SBs (0, 2, . . . ) for the first(i=0) CSI report. In one example, Q₂ comprises the following twosub-parts: SB CSI for all odd-numbered SBs (1, 3, . . . ) for the first(i=0) CSI report; and SB CSI for all SBs for remaining, i=1, 2 . . . ,K−1, CSI reports (e.g. CSI reports for K−1 CCs or cells).

In one embodiment of Alt 1Z-16, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into threeparts, Q₀, Q₁, Q₂, where Q₀ corresponds to the most-significant (MSB)bits and Q₂ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₂ corresponds to the MSB bits. In oneexample, Q₀ comprises WB CSI for all K CSI reports (e.g. CSI reports forK CCs or cells). In one example, Q₁ comprises SB CSI for all SBs of thefirst (i=0) CSI report. In one example, Q₂ comprises SB CSI for all SBsof remaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSI reports for K−1CCs or cells). The priority rule or order for the transmission of theseparts is as explained in Alt 1Z-1.

In a variation of this alternative, Q₂ is replaced with the followingK−1 parts, i.e., UCI part 2 bits (e.g. CSI bits or information bits orchannel coding bits) are partitioned into K+1 parts. For index, j=1, . .. , K−1, Q_(j+1) comprises SB CSI for all SBs of the j-th CSI report.

In one embodiment of Alt 1Z-17, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into threeparts, Q₀, Q₁, Q₂, where Q₀ corresponds to the most-significant (MSB)bits and Q₂ corresponds to the least significant (LSB) bits, or Q₀corresponds to LSB bits and Q₂ corresponds to the MSB bits. In oneexample, Q₀ comprises the following two sub-parts: WB CSI for all K CSIreports (e.g. CSI reports for K CCs or cells); and SB CSI for allodd-numbered SBs (1, 3, . . . ) for the first (i=0) CSI report. In oneexample, Q₁ comprises SB CSI for all even-numbered SBs (0, 2, . . . )for the first (i=0) CSI report. In one example, Q₂ comprises SB CSI forall SBs for remaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSI reportsfor K−1 CCs or cells). The priority rule or order for the transmissionof these parts is as explained in Alt 1Z-1.

In a variation of this alternative (Alt 1Z-17), the priority order ofodd-numbered SBs and even-numbered SBs for the first (i=0) CSI report isreversed, i.e., Q₀ and Q₁ are as follows. In one example, Q₀ comprisesthe following two sub-parts: WB CSI for all K CSI reports (e.g. CSIreports for K CCs or cells); and SB CSI for all even-numbered SBs (0, 2,. . . ) for the first (i=0) CSI report. In one example, Q₁ comprises SBCSI for all odd-numbered SBs (1, 3, . . . ) for the first (i=0) CSIreport.

In another variation of this alternative, Q₂ is replaced with thefollowing K−1 parts, i.e., UCI part 2 bits (e.g. CSI bits or informationbits or channel coding bits) are partitioned into K+1 parts. For index,j=1, . . . , K−1, Q_(j+1) comprises SB CSI for all SBs of the j-th CSIreport.

In one embodiment of Alt 1Z-18, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into two parts,Q₀, Q₁, where Q₀ corresponds to the most-significant (MSB) bits and Q₁corresponds to the least significant (LSB) bits, or Q₀ corresponds toLSB bits and Q₁ corresponds to the MSB bits. In one example, Q₀comprises the following two sub-parts: WB CSI for all K CSI reports(e.g. CSI reports for K CCs or cells); and SB CSI for all odd-numberedSBs (1, 3, . . . ) for the first (i=0) CSI report. In one example, Q₁comprises the following two sub-parts: SB CSI for all even-numbered SBs(0, 2, . . . ) for the first (i=0) CSI report; and SB CSI for all SBsfor remaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSI reports for K−1CCs or cells). The priority rule or order for the transmission of theseparts is as explained in Alt 1Z-8.

In a variation of this alternative (Alt 1Z-18), the priority order ofodd-numbered SBs and even-numbered SBs for the first (i=0) CSI report isreversed, i.e., Q₀ and Q₁ are as follows. In one example, Q₀ comprisesthe following two sub-parts: WB CSI for all K CSI reports (e.g. CSIreports for K CCs or cells); and SB CSI for all even-numbered SBs (0, 2,. . . ) for the first (i=0) CSI report. In one example, Q₁ comprises thefollowing two sub-parts: SB CSI for all odd-numbered SBs (1, 3, . . . )for the first (i=0) CSI report; and SB CSI for all SBs for remaining,i=1, 2 . . . , K−1, CSI reports (e.g. CSI reports for K−1 CCs or cells).

In one embodiment of Alt 1Z-19, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into two parts,Q₀, Q₁, where Q₀ corresponds to the most-significant (MSB) bits and Q₁corresponds to the least significant (LSB) bits, or Q₀ corresponds toLSB bits and Q₁ corresponds to the MSB bits. In one example, Q₀comprises the following two sub-parts: WB CSI for all K CSI reports(e.g. CSI reports for K CCs or cells); and SB CSI for all SBs of thefirst (i=0) CSI report. In one example, Q₁ comprises SB CSI for all SBsfor remaining, i=1, 2 . . . , K−1, CSI reports (e.g. CSI reports for K−1CCs or cells). The priority rule or order for the transmission of theseparts is as explained in Alt 1Z-8.

In a variation of this alternative, Q₁ is replaced with the followingK−1 parts, i.e., UCI part 2 bits (e.g. CSI bits or information bits orchannel coding bits) are partitioned into K parts. For index, j=1, . . ., K−1, Q_(j) comprises SB CSI for all SBs of the j-th CSI report.

In one embodiment of Alt 1Z-20, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into two parts,Q₀, Q₁, where Q₀ corresponds to the most-significant (MSB) bits and Q₁corresponds to the least significant (LSB) bits, or Q₀ corresponds toLSB bits and Q₁ corresponds to the MSB bits. In one example, Q₀corresponds to the CSI of the first (i=0) CSI report, and comprises thefollowing two sub-parts: WB CSI of the first (i=0) CSI report; and SBCSI for all SBs of the first (i=0) CSI report.

In one example, Q_(Z) corresponds to the CSI of the remaining, i=1, 2 .. . , K−1, CSI reports (e.g. CSI reports for K−1 CCs or cells), andcomprises the following two sub-parts: WB CSI of the remaining CSIreports; and SB CSI for all SBs of the remaining CSI reports. Thepriority rule or order for the transmission of these parts is asexplained in Alt 1Z-8.

In a variation of this alternative, Q₁ is replaced with the followingK−1 parts, i.e., UCI part 2 bits (e.g. CSI bits or information bits orchannel coding bits) are partitioned into K parts. For index, j=1, . . ., K−1, Q_(j+1) corresponds to the CSI for the j-th CSI report, andcomprises the following two sub-parts: WB CSI of the j-th CSI report;and SB CSI for all SBs of the j-th CSI report.

In one embodiment of Alt 1Z-21, the UCI part 2 bits (e.g. CSI bits orinformation bits or channel coding bits) are partitioned into two parts,Q₀, Q₁, where Q₀ corresponds to the most-significant (MSB) bits and Q₁corresponds to the least significant (LSB) bits, or Q₀ corresponds toLSB bits and Q₁ corresponds to the MSB bits.

In one example, Q₀ comprises the following two sub-parts: WB CSI of thefirst (i=0) CSI report; and SB CSI for all odd-numbered SBs (1, 3, . . .) for the first (i=0) CSI report. In one example, Q₁ comprises thefollowing three sub-parts: SB CSI for all even-numbered SBs (0, 2, . . .) for the first (i=0) CSI report; WB CSI of the remaining (i=1, 2, . . ., K−1) CSI reports; and SB CSI for all SBs for remaining, i=1, 2 . . . ,K−1, CSI reports (e.g. CSI reports for K−1 CCs or cells). The priorityrule or order for the transmission of these parts is as explained in Alt1Z-8.

In a variation of this alternative (Alt 1Z-21), the priority order ofodd-numbered SBs and even-numbered SBs for the first (i=0) CSI report isreversed, i.e., Q₀ and Q₁ are as follows. In one example, Q₀ comprisesWB CSI of the first (i=0) CSI report; and SB CSI for all even-numberedSBs (0, 2, . . . ) for the first (i=0) CSI report. In one example, Q₁comprises SB CSI for all odd-numbered SBs (1, 3, . . . ) for the first(i=0) CSI report; WB CSI of the remaining (i=1, 2, . . . , K−1) CSIreports; and SB CSI for all SBs for remaining, i=1, 2 . . . , K−1, CSIreports (e.g. CSI reports for K−1 CCs or cells).

If the CSI part 2 comprises only SB components, then a variation of atleast one of the alternatives (Alt 1Z-0 through Alt 1Z-21) is used forthe partial transmission of the UCI part 2 for K CSI reports wherein thepart(s) Q_(i) of UCI part 2 that include(s) WB CSI is (are) eitherremoved entirely (if the part comprises only WB CSI) or modified toincludes only SB CSI (if the part comprises both WB and SB CSI).

In the aforementioned embodiments, Alt 1Z-0 through Alt 1Z-21, the K CSIreports (e.g. CSI reports for K CCs or cells) are sorted (numbered)according to at least one of the following alternatives.

In one embodiment of Alt 1Z-A, the K CSI reports are sorted (numbered)based on a pre-defined rule. For example, if the CSI reports correspondto K CCs or cells, then the CSI reports are numbered (sorted) inincreasing order of CC or cell number, or, the CSI reports are numbered(sorted) in decreasing order of CC or cell number.

In one embodiment of Alt 1Z-B, the sorting (numbering) information isconfigured and/or indicated by the network or gNB. For example, thenetwork or gNB can configure/indicate the network or gNB'spreference/priority to receive multiple CSI reports if the UCI part 2 istransmitted partially. This configuration/indication is either viahigher layer (e.g. RRC) signaling or MAC CE based signaling or dynamicDCI (UL-related or DL-related) based signaling.

In one embodiment of Alt 1Z-C, the UE reports the numbering (sorting)information, for example in UCI part 1.

Some alternatives for PMI part I and PMI part II included in codewordsegment 1 and codeword segment 2, respectively, in Scheme 1/Scheme1A/Scheme 1B above can be described as follows.

In a first sub-embodiment of Scheme 1, PMI part I comprises the PMIreporting parameters associated with the first layer whereas PMI part IIcomprises PMI reporting parameters associated with the second to thelast layer (with RI=L, this layer corresponds to the L^(th)). Thisembodiment is relevant especially for Type II CSI when PMI can bedefined per layer.

In a second sub-embodiment of Scheme 1, PMI part I comprises the PMIreporting parameters associated with the first or first stage (wideband)PMI parameter i₁, or (i₁₁, i₁₂) which is common for all the layers,whereas PMI part II comprises PMI reporting parameters associated withthe second or second stage PMI parameter i₂ (which is RI-dependent).This embodiment is relevant for both Type I and Type II CSI when PMIpayload depends on the value of RI. In one example use case of thissub-embodiment where PMI frequency granularity is per subband, RI andthe first or first stage (wideband) PMI parameter i₁, or (i₁₁, i₁₂)—onei₁ report per CSI reporting band regardless of PMI frequencygranularity. The second or second stage PMI parameter i₂ (which isRI-dependent) can be reported per subband.

In a third sub-embodiment of Scheme 1, PMI part I comprises the PMIreporting parameters associated with the first or first stage (wideband)PMI parameter i₁, or (i₁₁, i₁₂) which is common for all the layers, aswell as the second or second stage PMI parameter i₂ associated with thefirst layer. PMI part II comprises PMI reporting parameters associatedwith the second or second stage PMI parameter i₂ associated with thesecond to the last layer (with RI=L, this layer corresponds to theL^(th)). This embodiment is relevant especially for Type II CSI when PMIcan be defined per layer.

In a fourth sub-embodiment of Scheme 1, when a UE is configured with CRIreporting (with or without CSI-RSRP), CRI or CRI+CSI-RSRP can beincluded in codeword segment 1, that is, jointly encoded with RI and atleast one other CSI parameter whose payload size is independent of RIvalue.

In a fifth sub-embodiment of Scheme 1 which is applicable for Type IICSI reporting with rank 1-2, WB beam amplitude/power coefficients (WBamp 1 for layer 1) can be reported separately in addition to the firstPMI (PMI part I) i₁ which indicates L beams (where L=2, 3, or 4). ThePMI part I comprises RI, CQI, PMI part I and WB amp 1 (for layer 1), andthe PMI part II comprises PMI part II, WB amp 2 (for layer 2 if RI=2),SB amp 1 (for layer 1), and SB amp 2 (for layer 2 if RI=2).

In a sixth sub-embodiment of Scheme 1 which is applicable for Type IICSI reporting with rank 1-2, WB beam amplitude/power coefficients (WBamp 1 for layer 1 and layer 2, if RI=2) can be reported separately inaddition to the first PMI (PMI part I) i₁. The PMI part I comprises RI,CQI, PMI part I, WB amp 1 (for layer 1) and WB amp 2 (for layer 2 ifRI=2), and the PMI part II comprises PMI part II, SB amp 1 (for layer1), and SB amp 2 (for layer 2 if RI=2).

Component 2—Aperiodic CSI (A-CSI) Reporting in Three Parts

In one embodiment of the present disclosure (Scheme 2), the CSIparameters included in PMI are partitioned into three parts: PMI part I,PMI part II, PMI part III. When a UE is configured with RI reporting,RI, CQI, and PMI part I are jointly encoded to form a codewordsegment 1. PMI part II is jointly encoded to form another codewordsegment 2. PMI part III is jointly encoded to form another codewordsegment 3.

For aperiodic CSI (A-CSI) reporting, gNB allocates resource (UL RBs) forUCI transmission (e.g. on PUSCH) without knowing what the UE reports forRI. For Type II, the payload difference between RI=1 and RI=2 is large,i.e., the payload for RI=2 is approximately 2 times of that for RI=1.The resource allocation is according to at least one of the followingschemes.

In one embodiment of scheme 2A, the PMI part I corresponds to L (whereL=2, 3, or 4) beams which are common for both RI=1 and RI=2, PMI part IIcorresponds to WB amp 1 for layer 1 and WB amp 2 for layer 2 (if RI=2 isreported), and PMI part III corresponds to SB amp 1 and SB phase 1 forlayer 1 and SB amp 2 and SB phase 2 for layer 2 (if RI=2 is reported).The resource allocation for the codeword segment 1 (which includes PMIpart I), codeword segment 2 (which includes PMI part II), codewordsegment 3 (which includes PMI part III) are in three different slots (orsubframes).

When A-CSI reporting is triggered, PUSCH resource is allocated accordingto the fixed payload size of codeword segment 1. Depending on the RIvalue (included in codeword segment 1) reported in the first CSIreporting instance, gNB determines RA to trigger another (second) A-CSIreporting for codeword segment 2. Depending on the RI value (included incodeword segment 1) reported in the first CSI reporting instance and WBamplitude (included in PMI part II), gNB determines RA to triggeranother (third) A-CSI reporting for codeword segment 3.

In a variation of this scheme (2A-1), the resource allocation for thecodeword segment 2 or/and 3 (regardless of the reported RI and WB amp 1and WB amp 2) is fixed. So, there is no need for additional signalingfor the resource location for codeword segment 2 and 3. For example, theresource allocation (UL RBs) can be fixed and correspond to maximumpayload for each PMI part assuming RI=2.

In another variation of this scheme (2A-2), the resource allocation forthe codeword segment 2 or/and 3 is configured (via DCI triggering orsignaling). For example, the resource allocation (UL RBs) can bedetermined based on the beta offset (in LTE) with respect to theresource allocation for codeword segment 1.

In another variation of scheme 2A/2A-1/2A-2, the WB amp 1 is included inPMI part I. Note that in this case, PMI part II comprises WB amp 2 ifRI=2, and PMI part II is not reported if RI=1.

In another variation of scheme 2A/2A-1/2A-2, PMI part I is included onPMI part II. Note that in this case, PMI part I comprises RI and CQI,and PMI part II comprises L beams, WB amp 1 and WB amp 2.

In this scheme and also in the rest of embodiments in the presentdisclosure, WB amp 1 and WB amp 2 respectively include the explicitindication of the strongest (out of 2L coefficients) coefficient forlayer 1 and layer 2.

In scheme 2B, the PMI part I, PMI part II, and PMI part III areconfigured to be reported in a single slot or subframe according to atleast one of the following variations of scheme 2B.

In one embodiment of Scheme 2B-0, the resource allocation (RA) scheme orsignaling for UL-related DCI is used for the purpose of UCI transmissionassuming a fixed value of RI if Type II CSI reporting is configuredregardless of the reported value of RI. For example, the fixed value ofRI for RA is RI=2.

In one embodiment of Scheme 2B-1, the resource allocation (RA) scheme orsignaling for UL-related DCI is used for the purpose of UCItransmission. A UE (and later gNB upon receiving the A-CSI report)interprets the RA field differently depending on the value of RI andregardless of the reported value of WB amp 1 and WB amp 2. The UEassumes a default RA=X PRBs which corresponds to a fixed RI value. Forexample, when X PRBs correspond to RI=1, then the UE assumes that thenumber of PRBs=K*X when RI=2, where K is a constant.

In one example of Alt2.1, K is configurable either semi-statically (viaRRC, higher layer signaling), or more dynamically (via MAC CE based orDCI signaling).

In one example of Alt2.2, K is pre-defined in the specification, e.g.K=1.5, or 2.

In one example of Alt2.3, K is determined implicitly depending on, e.g.frequency granularity (“wideband, or partial band, or subband” or “onereport for all subbands or one report per subband”) of CQI and/or PMI.TABLE 4 shows an example.

TABLE 4 K values Frequency granularity for PMI K Wideband 1 Partial band2 Subband 2

In one embodiment of Scheme 2B-2, the resource allocation (RA) scheme orsignaling for UL-related DCI is used for the purpose of UCItransmission. UE (and later gNB upon receiving the A-CSI report)interprets the RA field differently depending on the value of RI and thereported value of WB amp 1 and WB amp 2. The UE assumes a default RA=XPRBs which corresponds to a fixed RI value and a fixed number of WB amp1 and WB amp that are greater than 0. For example, when X PRBscorrespond to RI=1 and 2L−1 WB amp 1 (assuming all of X PRBs are greaterthan 0), then the UE assumes that the number of PRBs=K*M*X when RI=2,where K and M are constant.

In one example of Alt2.4, K and M are configurable eithersemi-statically (via RRC, higher layer signaling), or more dynamically(via MAC CE based or DCI signaling).

In one example of Alt2.5 K and L are pre-defined in the specification,e.g. K=1.5, or 2, and M=1 or 2.

In one example of Alt2.6 K and L are determined implicitly depending on,e.g. frequency granularity (“wideband, or partial band, or subband” or“one report for all subbands or one report per subband”) of CQI and/orPMI. TABLE 5 shows an example.

TABLE 5 K values Frequency granularity for PMI K L Wideband 1 1 Partialband 2 2 Subband 2 2

In one embodiment of Scheme 2B-3, in addition to the normal bitallocation for UCI transmission, additional bit(s) is (are) added inUL-related DCI to signal RA for both RI=1 and RI=2, or/and for both WBamp 1 and 2=0 and greater than 0 if Type II CSI reporting is configured.These additional bit(s) can be a part of at least one of or acombination of RA field or CSI request field, or other fields in theUL-related DCI. With these additional bits, the UL-related DCI signalingis expanded to indicate multiple hypotheses for two different RI valuesand multiple payload alternatives depending on number of WB amp 1 and2=0 or greater than 0.

In one embodiment of Scheme 2B-4, the gNB triggers A-CSI for a certainvalue of RI or/and a certain number of WB amp 1 or/and 2 greater than 0,and specifies the value of RI or/and the value of number of WB amp 1or/and 2 greater than 0 in the UL-related DCI. The RA is according tothe configured value of RI and number of WB amp 1 or/and 2 greater than0. Note that in this case even when the UE can support RI=2, the gNB mayrequest only RI=1 CSI. RI reporting can be according to one of thefollowing two options.

In one example of Alt1.4, a UE does not report RI and reports the CSIcorresponding to the configured value of RI.

In one example of Alt1.5, a UE reports RI, which can be different fromthe RI configured by the gNB. For example, if the configured value ofRI=2, UE can report RI=1 or RI=2.

In one embodiment of Scheme 2B-5, the scheme is the same as theaforementioned Scheme 1B-3. In one embodiment of Scheme 2B-6, the schemeis the same as the aforementioned Scheme 1B-4. In one embodiment, ofScheme 2B-7, the scheme is the same as Scheme 1B-5. In one embodiment ofScheme 2B-8, the scheme is the same as the aforementioned Scheme 1B-6.In one embodiment of Scheme 2B-9, the scheme is the same as theaforementioned Scheme 1B-7. In one embodiment of Scheme 2B-10, thescheme is the same as the aforementioned Scheme 1B-8. In one embodimentof Scheme 2B-11, the scheme is the same as the aforementioned Scheme1B-9 wherein RM is performed on the second part and/or the third part ifthe UCI payload is smaller or exceeds that accommodated by the indicatedRA/MCS.

FIG. 14 illustrates an example three-part UCI design 1400 according toembodiments of the present disclosure. The embodiment of the three-partUCI design 1400 illustrated in FIG. 14 is for illustration only. FIG. 14does not limit the scope of this disclosure to any particularimplementation. As shown in FIG. 14, RI, CQI, and I are combined as Part1 (e.g., UCI part 1) in step 1401. Wideband PMI is transmitted as Part 2(e.g., UCI part 2) in step 1402. Subband PMI is transmitted as Part 3(e.g., UCI part 2) in step 1403. In step 1404, the number of bits (P1)in Part 1, the number of bits (P2) in Part 2, and the number of bits(P3) in Part 3 are added to each other. In step 1405, a total number ofbits (P=P1+P2+P3) is compared with a number of bits B. If P is greaterthan B, P1+P2 is compared with B in step 1406. If P1+P2 is greater thanB in step 1406, the UCI part 1 is only transmitted, otherwise, the UCIpart 1 and part 2 are transmitted. In step 1405, if B is less than orequal to P, the UCI part 1, 2, and 3 are transmitted.

In one embodiment of scheme 2B-12, an example of which is illustrated inFIG. 14, for the three-part UCI design where the first part includesinformation such as RI, CQI, and, optionally, an indicator (1) about theWB amplitudes, if the UE finds that the total CSI payload (the number ofUCI information bits associated with the CSI report) exceeds the numberof bits that can be accommodated within the PUSCH resources for UCItransmission (either explicitly or implicitly allocated to the UE) or,optionally, exceeds a certain threshold (either fixed or configured),the UE does not transmit the third UCI part, otherwise the UE transmitsall three parts. If the total CSI payload after the removal of the thirdpart still exceeds the number of bits that can be accommodated withinthe PUSCH resources for UCI transmission (either explicitly orimplicitly allocated to the UE), the UE transmits only the first part(and not the second and third parts), otherwise the UE transmits UCIpart 1 and 2. The indicator (1) is according to at least one of thealternatives in Scheme 1B-10.

In a variation of scheme 2B-12, the first part does not include RI, andcomprises CQI and the indicator I. RI is not reported explicitly, butderived using the indicator I.

FIG. 15 illustrates another example three-part UCI design 1500 accordingto embodiments of the present disclosure. The embodiment of thethree-part UCI design 1500 illustrated in FIG. 15 is for illustrationonly. FIG. 15 does not limit the scope of this disclosure to anyparticular implementation. As shown in FIG. 15, RI, CQI, and I arecombined as Part 1 (e.g., UCI part 1) in step 1501. Wideband PMI istransmitted as Part 2 (e.g., UCI part 2) in step 1502. Subband PMI istransmitted as Part 3 (e.g., UCI part 2) in step 1503. In step 1504, thenumber of bits (P1) in Part 1, the number of bits (P2) in Part 2, andthe number of bits (P3) in Part 3 are added to each other. In step 1505,a total number of bits (P=P1+P2+P3) is compared with a number of bits B.If P is greater than B, P1+P2 is compared with B in step 1506. If P1+P2is greater than B in step 1506, the UCI Part 1 is transmitted, and UCIPart 2 and 3 are rate-matched and then transmitted in step 1507. In step1506, B is less than or equal to P1+P2, the UCI Part 1 and Part 2 aretransmitted, and UCI Part 3 is rate-matched and then transmitted. Instep 1505, B is less than or equal to P, the UCI part 1, 2, and 3 aretransmitted.

In one embodiment of scheme 2B-13, an example of which is illustrated inFIG. 15, for three-part UCI design where the first part includesinformation such as RI, CQI, and, optionally, an indicator (1), if theUE finds that the total CSI payload (the number of UCI information bitsassociated with the CSI report) exceeds the number of bits (e.g. X) thatcan be accommodated within the PUSCH resources for UCI transmission(either explicitly or implicitly allocated to the UE) or, optionally,exceeds a certain threshold (either fixed or configured), but the CSIpayload for part 1 and part 2 does not exceed B, then the UE transmitsUCI part 1 and UCI part 2 as is.

In addition, the UE performs rate matching to the third UCI part. Thiscan be done, for instance, by increasing the channel coding rate, orpartially puncturing or selecting the output of the channel encoder(e.g. Polar encoder), or by adjusting the modulation-coding-scheme (MCS)and/or beta offset factor used by the second UCI part. This ratematching can include no transmission (complete puncturing) as a specialcase, if the payload associated with the third UCI part is too largecompared to a certain threshold.

If the CSI payload for part 1 and part 2 exceeds B, then the UEtransmits the UCI part 1 as is. In addition, the UE performs ratematching to the second and the third UCI parts. This can be done, forinstance, by increasing the channel coding rate, or partially puncturingor selecting the output of the channel encoder (e.g. Polar encoder), orby adjusting the modulation-coding-scheme (MCS) and/or beta offsetfactor used by the second UCI part. This rate matching can include notransmission (complete puncturing) as a special case, if the payloadassociated with the second or/and third UCI parts is too large comparedto a certain threshold. The indicator (1) is according to at least oneof the alternatives in Scheme 1B-10.

In a variation of scheme 2B-13, the first part does not include RI, andcomprises CQI and the indicator I. RI is not reported explicitly, butderived using the indicator I.

In one embodiment of scheme 2B-14, as an example of scheme 1B-12, themultiple encoded parts correspond to three parts, part 1, part 2, andpart 3 (or first part or second part or third part) where part 1corresponds to the highest priority part, part 2 corresponds to themedium priority part, and part 3 corresponds to the lowest prioritypart. The CSI content of three parts is according to Scheme 2B-12 or2B-13, including the variation wherein the first part does not includeRI, and comprises CQI and the indicator I; RI is not reportedexplicitly, but derived using the indicator I.

The lower priority part(s) (part 2 or/and part 3) is/are transmitted infull (i.e. all CSI components are transmitted for all SBs) when RI=1 istransmitted in the highest priority part (part 1), and can betransmitted partially (according to at least one of Alt 1B-12a, 12b,12c, or 12d) or not transmitted when RI=2 is transmitted in the higherpriority part (part 1). The CQI transmission in part 1 is according toat least one alternative in Scheme 1B-12. The information whether thelower priority part(s) (part 2 or/and part 3) is/are transmitted (A)fully for all SBs or (B) partially for a subset of SBs or (C) dropped(not reported) for all SBs is determined according to at least one ofthe alternatives in scheme 1B-12.

In one embodiment of 2X, scheme 2B-12 of embodiment 2 is extended togeneral three-part UCI design including the cases of single componentcarrier (CC) or multiple CCs when carrier aggregation (CA) isconfigured. In particular, the UCI comprises three parts, a first UCIpart for a first CSI part, a second UCI part for a second CSI part, anda third UCI part for a third CSI part, where CSI corresponds to one CCor multiple CCs. If the UE finds that the total CSI payload (the numberof UCI information bits associated with the CSI report) exceeds thenumber of bits that can be accommodated within the PUSCH resources forUCI transmission (either explicitly or implicitly allocated to the UE)or, optionally, exceeds a certain threshold (either fixed orconfigured), the UE does not transmit the third UCI part, otherwise theUE transmits all three parts.

If the total CSI payload after the removal of the third part stillexceeds the number of bits that can be accommodated within the PUSCHresources for UCI transmission (either explicitly or implicitlyallocated to the UE), the UE transmits only the first part (and not thesecond and third parts), otherwise the UE transmits UCI part 1 and 2.

In one embodiment of 2Y, scheme 2B-13 of embodiment 2 is extended togeneral three-part UCI design including the cases of single componentcarrier (CC) or multiple CCs when carrier aggregation (CA) isconfigured. In particular, the UCI comprises three parts, a first UCIpart for a first CSI part, a second UCI part for a second CSI part, anda third UCI part for a third CSI part, where CSI corresponds to one CCor multiple CCs. If the UE finds that the total CSI payload (the numberof UCI information bits associated with the CSI report) exceeds thenumber of bits (e.g. X) that can be accommodated within the PUSCHresources for UCI transmission (either explicitly or implicitlyallocated to the UE) or, optionally, exceeds a certain threshold (eitherfixed or configured), but the CSI payload for part 1 and part 2 does notexceed B, then the UE transmits UCI part 1 and UCI part 2 as is.

In addition, the UE performs rate matching to the third UCI part. Thiscan be done, for instance, by increasing the channel coding rate, orpartially puncturing or selecting the output of the channel encoder(e.g. Polar encoder), or by adjusting the modulation-coding-scheme (MCS)and/or beta offset factor used by the second UCI part. This ratematching can include no transmission (complete puncturing) as a specialcase, if the payload associated with the third UCI part is too largecompared to a certain threshold.

If the CSI payload for part 1 and part 2 exceeds B, then the UEtransmits the UCI part 1 as is. In addition, the UE performs ratematching to the second and the third UCI parts. This can be done, forinstance, by increasing the channel coding rate, or partially puncturingor selecting the output of the channel encoder (e.g. Polar encoder), orby adjusting the modulation-coding-scheme (MCS) and/or beta offsetfactor used by the second UCI part. This rate matching can include notransmission (complete puncturing) as a special case, if the payloadassociated with the second or/and third UCI parts is too large comparedto a certain threshold.

In one embodiment 2Z, scheme 2B-14 of embodiment 2 is extended togeneral three-part UCI design including the cases of single componentcarrier (CC) or multiple CCs when carrier aggregation (CA) isconfigured. In particular, the UCI comprises three parts, a first UCIpart for a first CSI part, a second UCI part for a second CSI part, anda third UCI part for a third CSI part, where CSI corresponds to one CCor multiple CCs. If the UE finds that the total CSI payload (the numberof UCI information bits associated with the CSI report) exceeds thenumber of bits (e.g. X) that can be accommodated within the PUSCHresources for UCI transmission (either explicitly or implicitlyallocated to the UE) or, optionally, exceeds a certain threshold (eitherfixed or configured), but the CSI payload for part 1 and part 2 does notexceed B, then the UE transmits UCI part 1 and UCI part 2 as is.

In addition, the UE transmits the third UCI part either partially ordrops the third UCI part (does not transmit the third UCI part) (basedon at least one of the alternatives in scheme 1B-12). The informationwhether the third UCI part is reported (A) fully for all SBs or (B)partially for a subset of SBs or (C) dropped (not reported) for all SBsis determined according to at least one of the alternatives in scheme1B-12.

If the CSI payload for part 1 and part 2 exceeds B, then the UEtransmits the UCI part 1 as is. In addition, the UE transmits at leastone of the second and the third UCI parts either partially or drops thethird UCI part (does not transmit the third UCI part) (based on at leastone of the alternatives in scheme 1B-12). The information whether atleast one of the second and the third UCI parts is reported (A) fullyfor all SBs or (B) partially for a subset of SBs or (C) dropped (notreported) for all SBs is determined according to at least one of thealternatives in scheme 1B-12.

In a variation of embodiment 2Z, the partial UCI part 2 or/and part 3transmission in a three-part UCI design for K≥1 CSI reports (e.g. CSIreports for K CCs or cells) is according to an extension of at least oneof the alternatives (Alt 1Z-0 through Alt 1Z-21) in embodiment 1Z.

Some alternatives for PMI part I, PMI part II, and PMI part III includedin codeword segment 1, codebook segment 2, and codeword segment 3,respectively, in Scheme 2/Scheme 2A/Scheme 2B above can be described asfollows.

In a first sub-embodiment of Scheme 2, the three-part UCI multiplexingis used wherein CQI, RI, and PMI part I (indicating L beams) aremultiplexed and encoded together in part I, WB amp 1 and/or WB amp 2(included only if RI=2, otherwise only WB amp 1 included) in part II.The remaining parameters (SB amp 1, SB amp 2, SB phase 1, and SB phase2) are multiplexed in part III.

In a second sub-embodiment of Scheme 2, the three-part UCI multiplexingis used wherein CQI, RI, PMI part I (indicating L beams), and WB amp 1are multiplexed and encoded together in part I, WB amp 2 (included onlyif RI=2, otherwise nothing is included) in part II. The remainingparameters (SB amp 1, SB amp 2, SB phase 1, and SB phase 2) aremultiplexed in part III.

In a third sub-embodiment of Scheme 2, the three-part UCI multiplexingis used wherein CQI and RI are multiplexed and encoded together in partI, PMI part I (indicating L beams), WB amp 1 and/or WB amp 2 (includedonly if RI=2, otherwise only WB amp 1 included) in part II. Theremaining parameters (SB amp 1, SB amp 2, SB phase 1, and SB phase 2)are multiplexed in part III.

In a fourth sub-embodiment of Scheme 2, the three-part UCI multiplexingis used wherein CQI and RI, and WB amp 1 are multiplexed and encodedtogether in part I, PMI part I (indicating L beams) and WB amp 2(included only if RI=2, otherwise nothing is included) in part II. Theremaining parameters (SB amp 1, SB amp 2, SB phase 1, and SB phase 2)are multiplexed in part III.

In the aforementioned embodiments on Type II CSI reporting, the PMI partI (i₁) indicates L beams which comprises the following two components:the rotation factor (q₁,q₂) where q₁, q₂∈{0, 1, 2, 3}, which correspondsto 16 combinations (hence requires 4-bits reporting); and the selectionof L orthogonal beams, which is either joint, ┌log₂

^(N) ¹ _(L) ^(N) ²

┐ bits, or independent per beam, L┌log₂(N₁N₂)┐ bits. The two componentsare reported either jointly or separately as two components of PMI partI.

In the above embodiments on Type II CSI reporting, the WB amp 1 and WBamp 2 can also be referred to as RPI₀ and RPI₁ where RPI stands forrelative power indicator, and RPI₀ indicates the strongest/leadingcoefficient for the first layer and WB amplitudes p_(0,0) ^((WB)), . . ., p_(0,2L-2) ^((WB)) of remaining 2L−1 coefficients for the first layer,and RPI₁ indicates the strongest/leading coefficient for the secondlayer and WB amplitudes p_(1,0) ^((WB)), . . . , p_(1,2L-2) ^((WB)) ofremaining 2L−1 coefficients for the second layer.

The strongest/leading coefficients for the first layer and second layercan also refer to as SCI₀ and SCI₁, SCI stands for strongest coefficientindicator. In a variation, SCI₀ and SCI₁ can also be reported separatelyfrom WB amplitudes for the two layers. In this case, RPI₀ and RPI₁indicate the WB amplitude of the remaining 2L−1 coefficients for the twolayers.

In the aforementioned embodiments on Type II CSI reporting, the SB amp 1and SB amp 2 can also be referred to as SRPI₀ and SRPI₁ where SRPIstands for subband relative power indicator, and SRPI₀ indicates the SBamplitudes p_(0,0) ^((SB)), . . . , p_(0,2L-2) ^((SB)) of remaining 2L−1coefficients for the first layer, and SRPI₁ indicates the SB amplitudesp_(1,0) ^((SB)), . . . , p_(1,2L-2) ^((SB)) of remaining 2L−1coefficients for the second layer.

Component 3—Wideband CSI on PUSCH

In embodiment 3, a wideband or partial-band CSI (one CSI for all thesubbands in the CSI reporting band) is reported on PUSCH according to atleast one of the following two alternatives.

In one example of Alt 3A, the WB or partial-band CSI is reported suchthat the information payload remains the same irrespective of thereported RI/CRI in a given slot (to avoid blind decoding by the UE).Note that the size of information payload can be different according tothe largest number of CSI-RS ports of the CSI-RS resources configuredwithin a CSI-RS resource set. Two examples to ensure the same payloadsize are as follows: when PMI and CQI payload size varies with RI/CRI,padding bits are added to RI/CRI/PMI/CQI prior to encoding to equalizethe payload associated with different RI/CRI values; and RI/CRI/PMI/CQI,along with padding bits when necessary, is jointly encoded.

In one example of Alt 3B, the two-part UCI design according to some ofthe embodiments of the present disclosure is still used. As an example,the WB CQI is reported in UCI part 1 and WB or SB PMI is reported in UCIpart 2.

In one example of Alt 3C, the three-part UCI design according to some ofthe embodiments of the present disclosure is still used. As an example,the WB CQI is reported in UCI part 1 and WB or SB PMI is reported in UCIpart 2 and part 3.

In one embodiment 4, which is a variation of embodiment 3, when a UE isscheduled to transmit UL data using PUSCH in a slot n, and UCI carryingwideband or partial band CSI is also scheduled to be transmitted using(short or long) PUCCH in the same slot (n), then the UEpiggybacks/reports UCI carrying wideband or partial band CSI on PUSCH(not on PUCCH). This can be used, for instance, whensimultaneous/concurrent reception of PUSCH and PUCCH is not configured.At least one of the following alternatives is used to piggyback/reportUCI on PUSCH.

In one example of Alt 4-0, UCI is transmitted as a single UCI withoutany padding (for example, zero padding) bits to maintain the number ofCSI (CRI/RI/PMI/CQI) information bits to a fixed value, and therefore,the CSI information bits piggybacked on PUSCH can potentially change,for example, depending on the reported CRI/RI value. In addition, ifPUSCH resource allocation is such that the PUSCH resource allocation canaccommodate two-part UCI transmission (UCI part 1 and UCI part 2, asexplained in some embodiments of the present disclosure), then at leastone of the following sub-alternatives is used.

In one example of Alt 4-0-0, the wideband or partial band CSI istransmitted using UCI part 1, and UCI part 2 is not used to transmit anyCSI.

In one example of Alt 4-0-1, the wideband or partial band CSI istransmitted using UCI part 2, and UCI part 1 is not used to transmit anyCSI.

In a variation of this alternative (Alt 4-0A), all of the reportedwideband or partial band CSI parameters are jointly encoded into onecodeword. This codeword, after code block (CB) CRC insertion (orpotentially CB segmentation), is an input to a channel coding block. Inanother variation (Alt 4-0B), a CRC is not added when the codewordsegment is short (e.g. less than a fixed number of bits).

In Alt 4-1, UCI is transmitted as a single UCI with padding (forexample, zero padding) bits to maintain the number of CSI(CRI/RI/PMI/CQI) information bits to a fixed value. At least one of thefollowing alternatives is used to insert padding (for example, zeropadding) bits with the CSI bits.

In one example of Alt 4-1-0, padding (for example, zero padding) bits isinserted in between the bits for CRI/RI and PMI/CQI. For example, CRIbits is followed by RI bits, which is followed by padding (for example,zero padding) bits, which is followed by PMI bits, which in turn isfollowed by CQI bits, i.e., CRI→RI→padding bits→PMI→CQI, where CRI bitscorrespond to either least significant bits (LSBs) or most significantbits (MSBs).

In one example of Alt 4-1-1, padding (for example, zero padding) bits isinserted in the end. For example, CRI bits is followed by RI bits, whichis followed by PMI bits, which in turn is followed by CQI bits, which isfollowed by padding (for example, zero padding) bits, i.e.,CRI→RI→PMI→CQI→padding bits, where CRI bits correspond to either leastsignificant bits (LSBs) or most significant bits (MSBs).

In one example of Alt 4-1-2, padding (for example, zero padding) bits isinserted in the beginning. For example, zero padding bits is followed byCRI, which is followed by RI bits, which is followed by PMI bits, whichin turn is followed by CQI bits, i.e., padding bits→CRI→RI→PMI→CQI,where padding bits correspond to either least significant bits (LSBs) ormost significant bits (MSBs)

In addition, if PUSCH resource allocation is such that the PUSCHresource allocation can accommodate two-part UCI transmission (UCI part1 and UCI part 2, as explained in some embodiments of the presentdisclosure), then at least one of the following sub-alternatives isused.

In one example of Alt 4-1-3, the wideband or partial band CSI istransmitted using UCI part 1, and UCI part 2 is not used to transmit anyCSI.

In one example of Alt 4-1-4, the wideband or partial band CSI istransmitted using UCI part 2, and UCI part 1 is not used to transmit anyCSI.

In a variation of this alternative (Alt 4-1A), all of the reportedwideband or partial band CSI parameters (including the padding bits) arejointly encoded into one codeword. This codeword, after code block (CB)CRC insertion (or potentially CB segmentation), is an input to a channelcoding block. In another variation (Alt 4-1B), a CRC is not added whenthe codeword segment is short (e.g. less than a fixed number of bits).

In Alt 4-2, wideband or partial band CSI is partitioned into two parts(CSI part 1 and CSI part 2) and UCI part 1 and UCI part 2 are used totransmit CSI part 1 and CSI part 2, respectively. The CSI part 1 and CSIpart 2 are determined according to at least one embodiment of thepresent disclosure. For example, CSI part 1 comprises CRI, RI, 1^(st)CQI; and CSI part 2 comprises PMI, 2^(st) CQI (if RI>4 is reported).

In a variation of this alternative (Alt 4-2A), all of the reportedwideband or partial band CSI parameters for CSI part 1 are jointlyencoded into one codeword (e.g. codeword segment 1), and all of thereported wideband or partial band CSI parameters for CSI part 2 arejointly encoded into another codeword (e.g. codeword segment 2). Eitherthe codeword segment 1, after code block (CB) CRC insertion (orpotentially CB segmentation), is an input to a channel coding block, orthe codeword segment 2, after code block (CB) CRC insertion (orpotentially CB segmentation), is an input to a channel coding block, orboth the codeword segment 1 and codeword segment 2, after code block(CB) CRC insertion (or potentially CB segmentation), are inputs to therespective channel coding blocks. In another variation (Alt 4-2B), a CRCis not added when at least one of the codeword segment 1 or codewordsegment 2 is short (e.g. less than a fixed number of bits).

If the wideband or partial band CSI includes the strongest layerindicator (LI), then embodiment 4 and example alternatives (Alt 4-0,4-1, or/and 4-2) can be extended to include LI in addition to other CSIparameters (CRI/RI/PMI/CQI). In particular, LI bits can be in thebeginning, hence, followed by CRI bits (e.g. LI→CRI→RI→ . . . ). Or, LIbits can be in the end, hence, followed by CQI (e.g . . . →PMI→CQI→LI).Or, LI bits can be in between RI and PMI bits (e.g . . . →RI→LI→PMI→ . .. ).

Component 4—Aperiodic Beam Reporting on PUSCH

FIG. 16 illustrates an example multi-beam based system 1600 according toembodiments of the present disclosure. The embodiment of the multi-beambased system 1600 illustrated in FIG. 16 is for illustration only. FIG.16 does not limit the scope of this disclosure to any particularimplementation.

The future cellular systems (such as 5G) are expected to be a multi-beambased system. In such a system, multiple beams are used to cover onecoverage area. An example for illustration is shown in FIG. 16. Asshown, one gNB has one or more TRPs. Each TRP uses one or more analog orradio frequency (RF) beams to cover some area. To cover one UE in oneparticular area, the gNB uses one or more analog beams to transmit andreceive the signal to and from that UE. The gNB and the UE need todetermine the beam(s) used for their connection. When the UE moveswithin one cell coverage area, the beam(s) used for this UE may bechanged and switched. The operation of managing those beams are radioaccess network layer 1 (L1) and layer 2 (L2) operation.

For instance, the following L1/L2 beam management procedures are used.In one example of P-1, the L1/L2 beam management procedures are used toenable UE measurement on different TRP TX beams to support selection ofTRP TX beams/UE Rx beam(s). In such example, for beamforming at TRP, theL1/L2 beam management procedures typically include an intra/inter-TRP TXbeam sweep from a set of different beams. For beamforming at UE, theL1/L2 beam management procedures typically include a UE Rx beam sweepfrom a set of different beams.

In one example of P-2, the L1/L2 beam management procedures are used toenable UE measurement on different TRP TX beams to possibly changeinter/intra-TRP TX beam(s). In such example, from a possibly smaller setof beams for beam refinement than in P-1. Note that P-2 can be a specialcase of P-1.

In one example of P-3, the L1/L2 beam management procedures are used toenable UE measurement on the same TRP TX beam to change UE Rx beam inthe case UE uses beamforming.

In the present disclosure, a “beam” can correspond to an RS resource,whether the beam is a sounding reference signal (SRS), CSI-RS, beam RS,measurement RS, or any other type of RS.

In high frequency band system (e.g., >6 GHz system), the TRP and the UEcan be deployed with large number of antennas to relay on the high gainbeamforming to defeat the large path loss and signal blockage. A generalsystem configuration is that the TRP and UE have large number antennasbut only one or a few TXRUs. So hybrid beamforming mechanism is utilizedwherein both analog (RF) and digital (baseband) beamforming are utilizedfor transmission. Analog beams with different direction can beformulated on the antenna array that is connected to one TXRU.

To get the best link quality and coverage distance, the TRP and UE needto align the analog beam directions for each particular downlink anduplink transmission. An example mechanism to align analog beams (e.g.for DL) includes multiple RS transmission from the gNB where each RScorresponds to an analog beam, and at least one RS reporting from theUE. In one example, the RS corresponds to CSI-RS, and the UE reports oneor more CRI to indicate analog beam(s) selection. In another example,the RS corresponds to SS/PBCH, and the UE reports one of more SSBresource indicator or SS/PBCH block resource indicator (SSBRI). Inaddition to the resource indicator (CRI or SSBRI), the UE also reportsthe quality of the reported beams in the form of layer 1 referencesignal received power (L1-RSRP). If multiple (N>1) CRI or SSBRI arereported, then the corresponding L1-RSRP can be reported differentiallywherein B1 bits are used to report one L1-RSRP and B2 bits are used toreport each of the remaining (N−1) differential L1-RSRPs. An example ofB1 is 7. An example of B2 is 4.

In the present disclosure, the schemes of beam reporting, i.e., CRI orSSBRIS together with L1-RSRP, are provided. In particular, aperiodicbeam reporting on PUSCH is considered.

In CSI configuration framework, the UE can be configured with higherlayer parameter ReportQuantity set to be “CRI/RSRP” or “SSBRI/RSRP”.When the UE is configured with “CRI/RSRP”, the UE can be requested toreport N different CRIs and their corresponding L1-RSRP based onemeasuring K configured CSI-RS resources. An example of K value is 16, 32or 64. When the UE is configured with “SSBRI/RSRP”, the UE can berequested to report N different SSBRIs and their corresponding L1-RSRPvalues. The example of N can be 1, 2, 3, and 4

For aperiodic CRI/RSRP and SSBRI/RSRP reporting, UL channel PUSCH can beused, or, optionally, UL channel long PUCCH or short PUCCH can be used.In short PUCCH channel, PUCCH format 2 can be used for aperiodicCRI/RSRP and SSBRI/RSRP reporting. In long PUCCH channel, PUCCH format 3and 4 can be used for aperiodic CRI/RSRP and SSBRI/RSRP reporting.

In one embodiment 4, the aperiodic beam reporting is triggered and/orconfigured for a UE according to at least one of the following reportingschemes. If multiple schemes are supported in the specification, thenone of the multiple scheme is configured to the UE (e.g. via higherlayer RRC or MAC CE based or DCI based signaling).

In one embodiment of scheme 4A, the UE is triggered to transmit/reportaperiodic beam report comprising N reported CRIs or SSBRIs and theircorresponding N L1-RSRP and differential L1-RSRPs on PUSCH (or shortPUCCH or long PUCCH) in one part (using a single UCI segment) regardlessof the value of N. The UE can determine the bit size of beam reportpayload size for a given value of N.

If the bit size of beam report payload is less than or equal to that canbe accommodated in a single UCI (based on RA), the UE cantransmit/report the whole beam report with N selected CRIs or SSBRIs andtheir corresponding N L1-RSRP and differential L1-RSRPs in one partusing a single UCI segment.

Otherwise, (or If the bit size of beam report payload is larger thanthat can be accommodated in a single UCI), the UE can report only asubset of the beam report with N selected CRIs or SSBRIs and theircorresponding N L1-RSRP and differential L1-RSRP. The subset the UE canreport can be one of the following.

In one example of Alt 4.1, the M CRIs or SSBRIs of N CRIs or SSBRIs withthe largest L1-RSRP. M can be the largest number of that the bit size ofreport with M CRIs or SSBRIs and M L1-RSRP/differential L1-RSRP is nomore than that can be accommodated in one part (of the single UCIsegment).

In one example of Alt 4.2, the subset (M out of N) is reported by theUE, The UE can also report which subset is reported. In one example, anadditional signaling with

$\left\lceil {\log_{2}\begin{pmatrix}N \\M\end{pmatrix}} \right\rceil$

bits can be signaled from the UE to indicate which subset is reported.

In one example of Alt 4.3, the subset is configured to the UE, forexample, via higher layer (RRC) or more dynamic MAC CE based or DCIbased signaling.

In a variation of scheme 4A, the UE determines the transmission behaviorbased on achieved code rate that is calculated by assuming the wholebeam report payload with N CRIs/SSBRIs is sent in one part using asingle UCI. If the achieved code rate is less than (or equal to) somethreshold, the UE can transmit and report the whole beam report with NCRIs or SSBRIs and their corresponding N L1-RSRP/differential L1-RSRP inone part (using a single UCI segment). If the achieved code rate islarger than some threshold, the UE can only transmit a subset of thebeam report with those N selected CRIs/SSBRIs and their correspondingL1-RSRP/differential L1-RSRP. The selection of a subset can be accordingone of the alternatives described above. In an example, the threshold isdetermined based on the coding rate (c_(MCS)) and the beta_offset(β_(offset)) configured for the UCI transmission,

${e.g.\mspace{14mu} c_{T}} = {\frac{c_{MCS}}{\beta_{offset}}.}$

In one embodiment of scheme 4B, the UE is triggered to transmit/reportaperiodic beam report comprising N reported CRIs or SSBRIs and theircorresponding N L1-RSRP and differential L1-RSRPs on PUSCH (or shortPUCCH or long PUCCH) in 1 or 2 parts (using 1 or 2 UCI segments). The UEdetermines whether to transmit one beam report in one or two parts basedon the information of bit size of beam report payload size. If the bitsize of beam report payload is large, the UE partitions the beam reportcontents into two parts and transmit these two parts using two UCIsegments. If the bit size of beam report payload is small, the UEtransmits the whole content of one beam report instance with N reportedCRIs or SSBRIs and their corresponding N L1-RSRPs in one part using oneUCI segment.

Alternatively, the UE determines whether to transmit one beam report inone or two parts based on the value N. If N>A, where A is a fixed value(e.g. A=2), the UE partitions the beam report contents into two partsand transmit these two parts using two UCI segments. If N<=A, the UEtransmits the whole content of one beam report instance with N reportedCRIs or SSBRIs and their corresponding N L1-RSRPs in one part using oneUCI segment. Alternatively, the UE determines whether to transmit onebeam report in one or two parts based on the achieved code rate, forexample, by comparing the code rate with a fixed threshold as explainedin scheme 4A.

In one embodiment of scheme 4C, the UE is triggered to transmit/reportaperiodic beam report comprising N reported CRIs or SSBRIs and theircorresponding N L1-RSRP and differential L1-RSRPs on PUSCH (or shortPUCCH or long PUCCH) in 1, 2, . . . , or, M parts (using 1, 2, . . . ,or M UCI segments), where the value M is fixed and is determined basedon a fixed condition such as the value N, bit size of the beam report,achieved code rate etc. as explained in scheme 4B.

In one example of Definition of Collision, a beam report and a CSIreport or two CSI reports are said to collide if the time occupancy ofthe physical channels scheduled to carry the CSI reports overlap in atleast one OFDM symbol and are transmitted on the same carrier.

In one embodiment 5, when aperiodic beam report (according to schemes ofembodiment 4) collides with aperiodic CSI report (according to schemesin embodiments 1/2/3), then at least one of the following reportingschemes is used. If multiple schemes are supported in the specification,then one of the multiple schemes is configured to the UE (e.g. viahigher layer RRC or MAC CE based or DCI based signaling).

In one embodiment of scheme 5A, at least one of the aperiodic beamreport or aperiodic CSI report, either fully or partially, is dropped(not reported) whenever collide. At least one of the followingalternatives is use for dropping.

In one example of Alt 5A-0, the aperiodic CSI report is dropped.

In one example of Alt 5A-1, the aperiodic beam report is dropped.

In one example of Alt 5A-2, this is configured (via higher later RRC orMAC CE based or DCI based signaling) with which of the two (aperiodicbeam report or aperiodic CSI report) is dropped.

In one example of Alt 5A-3, when CSI is expected to be reported in twoparts (CSI part 1 and CSI part 2) using two UCI segments (if the CSIdoes not collide with beam report) and beam is reported in one part,then at least one of the following sub-alternatives is used.

In one example of Alt 5A-3-0, CSI part 1 and beam report are reported intwo parts using UCI segment 1 and 2, respectively, and CSI part 2 isdropped.

In one example of Alt 5A-3-1, CSI part 2 and beam report are reported intwo parts using UCI segment 1 and 2, respectively, and CSI part 1 isdropped.

In one example of Alt 5A-3-2, CSI part 1 and CSI part 2 are reported intwo parts using UCI segment 1 and 2, respectively, and beam report isdropped.

In one example of Alt 5A-4, when beam is expected to be reported in twoparts (beam report part 1 and beam report part 2) using two UCI segments(if the beam did not collide with CSI report), then at least one of thefollowing sub-alternatives is used.

In one example of Alt 5A-4-0, beam report part 1 and CSI report arereported in two parts using UCI segment 1 and 2, respectively, and beamreport part 2 is dropped.

In one example of Alt 5A-4-1, beam report part 2 and CSI report arereported in two parts using UCI segment 1 and 2, respectively, and beamreport part 1 is dropped.

In one example of Alt 5A-4-2, beam report part 1 and beam report part 2are reported in two parts using UCI segment 1 and 2, respectively, andCSI report is dropped.

In one example of Alt 5A-5, when CSI is expected to be reported in twoparts (CSI part 1 and CSI part 2) using two UCI segments (if the CSI didnot collide with beam report), and beam is expected to be reported intwo parts (beam report part 1 and beam report part 2) using two UCIsegments (if the beam did not collide with CSI report), then at leastone of the following sub-alternatives is used.

In one example of Alt 5A-5-0, CSI part 1 and beam report part 1 arereported in two parts using UCI segment 1 and 2, respectively, and CSIpart 2 and beam report part 2 are dropped.

In one example of Alt 5A-5-1, CSI part 1 and CSI part 2 are reported intwo parts using UCI segment 1 and 2, respectively, and beam report part1 and beam report part 2 are dropped.

In one example of Alt 5A-5-2, beam report part 1 and beam report part 2are reported in two parts using UCI segment 1 and 2, respectively, andCSI part 1 and CSI part 2 are dropped. When CSI part 2 is transmittedpartially, (according to some embodiment of the present disclosure),then alternatives in scheme 5A can be extended to include partialtransmission of CSI part 2.

In one embodiment of scheme 5B, both aperiodic beam report and aperiodicCSI report are multiplexed and reported according to at least one of thefollowing alternatives.

In one example of Alt 5B-0, both CSI report and beam report aremultiplexed and reported in one part as a single UCI segment.

In one example of Alt 5B-1, CSI report is reported in one part as UCIsegment 1 and beam report is reported in one part as UCI segment 2. Notethat when CSI and beam report do not collide, then each one of the CSIand beam report is reported in one part as a single UCI segment. Inother words, CSI report and beam report are reported using two UCIsegments only when the CSI report and beam report collide, otherwise theCSI report and beam report are reported using one UCI segment. Also, thepresence of UCI segment 2 can be indicated in UCI segment 1 by using1-bit signaling or via higher layer (e.g. RRC) or dynamic DCI basedsignaling.

In one example of Alt 5B-2, same as Alt 5B-1 except that CSI report isreported in one part as UCI segment 2 and beam report is reported in onepart as UCI segment 1.

In one example of Alt 5B-3, when CSI is expected to be reported in twoparts (CSI part 1 and CSI part 2) using two UCI segments (if the CSI didnot collide with beam report) and beam is reported in one part, then atleast one of the following sub-alternatives is used.

In one example of Alt 5B-3-0, CSI part 1 and beam report are multiplexedand reported in one part using UCI segment 1, and CSI part 2 is reportedin one part using UCI segment 2.

FIG. 17 illustrates an example beam report 1700 according to embodimentsof the present disclosure. The embodiment of the beam report 1700illustrated in FIG. 17 is for illustration only. FIG. 17 does not limitthe scope of this disclosure to any particular implementation.

In one example of Alt 5B-3-1, CSI part 2 and beam report are multiplexedand reported in one part using UCI segment 2, and CSI part 1 is reportedin one part using UCI segment 1. For the case when CSI part 2 can betransmitted partially based on a priority order (cf. FIG. 13) bypartitioning CSI part 2 bits into multiple segments, the beam report canbe included (Option 0) in the highest priority segment (Q0 for WB CSI)as shown in FIG. 17. Alternatively, the beam report is includedseparately either before or after (Option 1 and 2). An illustration isshown in FIG. 17.

In one example of Alt 5B-4, when beam is expected to be reported in twoparts (beam report part 1 and beam report part 2) using two UCI segments(if the beam did not collide with beam report) and CSI report isreported in one part, then at least one of the followingsub-alternatives is used.

In one example of Alt 5B-4-0, beam report part 1 and CSI report aremultiplexed and reported in one part using UCI segment 1, and beamreport part 2 is reported in one part using UCI segment 2.

In one example of Alt 5B-4-1, beam report part 2 and CSI report aremultiplexed and reported in one part using UCI segment 2, and beamreport part 1 is reported in one part using UCI segment 1.

In one example of Alt 5B-5, when CSI is expected to be reported in twoparts (CSI part 1 and CSI part 2) using two UCI segments (if the CSI didnot collide with beam report), and beam is expected to be reported intwo parts (beam report part 1 and beam report part 2) using two UCIsegments (if the beam did not collide with CSI report), then at leastone of the following sub-alternatives is used.

In one example of Alt 5B-5-0, CSI part 1 and beam report part 1 aremultiplexed and reported in one part using UCI segment 1, and CSI part 2and beam report part 2 are multiplexed and reported in one part usingUCI segment 2. For the case when CSI part 2 can be transmitted partiallybased on a priority order (cf. FIG. 13) by partitioning CSI part 2 bitsinto multiple segments, at least one of Option 0-2 in FIG. 17 can beused.

In one example of Alt 5B-5-1, CSI part 2 and beam report part 2 aremultiplexed and reported in one part using UCI segment 1, and CSI part 1and beam report part 1 are multiplexed and reported in one part usingUCI segment 2. For the case when CSI part 2 can be transmitted partiallybased on a priority order (cf. FIG. 13) by partitioning CSI part 2 bitsinto multiple segments, at least one of Option 0-2 in FIG. 17 can beused.

Component 5—Multiplexing Periodic/Semi-Persistent Beam Reporting andA-CSI

In one embodiment 6, when a periodic beam report collides with anaperiodic CSI report, then at least one of the following alternatives isused.

In one example of Alt 6-0, the periodic beam report is dropped.

In one example of Alt 6-1, the periodic beam report is multiplexed andreported with the aperiodic CSI reported. For example, at least one ofthe schemes or/and alternatives of embodiment 5 can be used.

In one embodiment 7, when semi-persistent beam report collides with anaperiodic CSI report, then at least one of the following alternatives isused.

In one example of Alt 7-0, the semi-persistent beam report is dropped.

In one example of Alt 7-1, the semi-persistent beam report ismultiplexed and reported with the aperiodic CSI reported. For example,at least one of the schemes or/and alternatives of the aforementionedembodiment 5 can be used.

In semi-persistent beam reporting, the UE can receive an activationmessage or selection message from higher layer and then the UE wouldbegin the report beam reporting with N beams (N beam IDs and theircorresponding L1-RSRP or differential L1-RSRP). The UE can continuereporting periodically until an inactivation message is received fromhigher layer. A semi-persistent beam reporting can be transmitted onPUSCH, long PUCCH and short PUCCH.

Component 6: Beam Reporting for MIMO.

In some embodiments, a UE can be configured with N sets of CSI-RSresources and there can be one or multiple CSI-RS resources in each set.The UE can be requested to measure the transmission of those N sets ofCSI-RS resource and then report at least one CSI-RS resource indexselected from every configured set and the corresponding rank indicator,CQI and/or CSI-RSRP measurement.

CSI-RS resource is used for exemplary explanation. It can be any RStype. The CSI-RS resource can be replaced with SS block without changingany method in this disclosure.

In one embodiment, a UE can be configured with N (>1) CSI-RS resourcesets. The set n (=1, 2, . . . , N) has K_(n) CSI-RS resources. TheCSI-RS resources in the set n are {c_(n,1), c_(n,2), . . . , c_(n,K)_(n) }.

The UE can be requested to report the following information. In oneexample, the UE can be requested to report one CSI-RS resource indexselected from each configured set of n=1, 2, . . . , N:{c_(1,i) ₁ ,c_(2,i) ₂ , . . . , c_(n,i) _(n) }, where c_(1,i) ₁ is one CSI-RSresource index selected from CSI-RS resource set 1, c_(2,i) ₂ is oneCSI-RS resource index selected from CSI-RS resource set 2, c_(n,i) _(n)is one CSI-RS resource index selected from CSI-RS resource set n forn=1, 2, . . . , N.

In one example, the UE can be requested to report a rank indicator, R₀,corresponding to the reported CSI-RS resource indices {c_(1,i) ₁ ,c_(2,i) ₂ , . . . , c_(n,i) _(n) }. The UE can be requested to calculateR₀ by assuming the CSI-RS resources {c_(1,i) ₁ , c_(2,i) ₂ , . . . ,c_(n,i) _(n) } are transmitted through N different TXRUs from the gNBand the UE uses the same Rx beam to receive.

In one example, the UE can be requested to report a CQI valuecorresponding to the reported CSI-RS resource indices {c_(1,i) ₁ ,c_(2,i) ₂ , . . . , c_(n,i) _(n) }. The UE can be requested to calculatethe CQI value by assuming the CSI-RS resources {c_(1,i) ₁ , c_(2,i) ₂ ,. . . , c_(n,i) _(n) } are transmitted through N different TXRUs fromthe gNB.

In one example, the UE can be requested to report the sum of theCSI-RSRP of CSI-RS resources {c_(1,i) ₁ , c_(2,i) ₂ , . . . , c_(n,i)_(n) }.

In one embodiment, a UE can be configured with N (>1) CSI-RS resourcesets. The set n (=1, 2, . . . , N) has K_(n) CSI-RS resources. TheCSI-RS resources in the set n are {c_(n,1), c_(n,2), . . . , c_(n,K)_(n) }. The UE can be also configured with MIMO transmission mode thatthe UE may use as criterion to select CSI-RS index. The MIMOtransmission mode configuration information can be indication of a rankindicator R₁. The UE can be requested to report.

In one example, the UE can be requested to report one CSI-RS resourceindex selected from each configured set of n=1, 2, . . . , N:{c_(1,i) ₁, c_(2,i) ₂ , . . . , c_(n,i) _(n) }, where c_(1,i) ₁ is one CSI-RSresource index selected from CSI-RS resource set 1, c_(2,i) ₂ is oneCSI-RS resource index selected from CSI-RS resource set 2, c_(n,i) _(n)is one CSI-RS resource index selected from CSI-RS resource set n forn=1, 2, . . . , N. The rank indicator that the UE calculate based onreported CSI-RS resource indices {c_(1,i) ₁ , c_(2,i) ₂ , . . . ,c_(n,i) _(n) } maybe not less than configured rand indicator R₁. The UEcan be requested to calculate rank indicator by assuming the CSI-RSresources {c_(1,i) ₁ , c_(2,i) ₂ , . . . , c_(n,i) _(n) }, aretransmitted through N different TXRUs from the gNB.

In one example, the UE can be requested to report a CQI valuecorresponding to the reported CSI-RS resource indices {c_(1,i) ₁ ,c_(2,i) ₂ , . . . , c_(n,i) _(n) } and assuming R₁ data streams would betransmitted. The UE can be requested to calculate the CQI value byassuming the CSI-RS resources {c_(1,i) ₁ , c_(2,i) ₂ , . . . , c_(n,i)_(n) } are transmitted through N different TXRUs from the gNB.

In one example, the UE can be requested to report the sum of theCSI-RSRP of CSI-RS resources {c_(1,i) ₁ , c_(2,i) ₂ , . . . , c_(n,i)_(n) }.

Component 7: Beam Reporting for MU-MIMO.

In some embodiments, a UE can be configured with N sets of CSI-RSresources and there can be one or multiple CSI-RS resources in each set.A first group of those N CSI-RS sets can be configured as serving setand a second group of those N CSI-RS sets can be configured asinterference set. The UE can be requested to measure the transmission ofthose N sets of CSI-RS resource and then report at least one CSI-RSresource index selected from every configured set and the correspondingrank indicator, CQI and/or CSI-RSRP measurement by measuring the CSIfrom CSI-RS resources in the sets in a first group and measuringinterference from CSI-RS resources in the sets in a second group.

There can be one or more CSI-RS resource set in a first group. There canbe one or more CSI-RS resource sets in a second group. The UE can berequested to measure those CSI-RS resources by assuming that any CSI-RSresource in a first group of sets may be used for CSI measurement andthat any CSI-RS resource in a second group of sets may be used forinterference measurement. The UE can be requested to report at least oneCSI-RS resource selected from each CSI-RS resource set and acorresponding RI, CQI and/or RSRP, where the RI and CQI may becalculated by assuming to use the reported CSI-RS resource selected froma first group of sets as CSI measurement and the reported CSI-RSresources selected from a second group of sets as interferencemeasurement. The UE can be configured with one or more of the followingconfigurations: N sets of CSI-RS resources. Each set can have one ormore CSI-RS resources.

The feature definition of each set. It indicate whether the TX beamscarried by the CSI-RS resources in one set is used as serving beam andthe UE can be requested to measure beam quality on the CSI-RS resources.It indicates whether the TX beams carried by the CSI-RS resources in oneset are used as interference beam and the UE can be requested to measureif the TX beams can cause interference to the UE. It can indicatewhether the TX beams carried by the CSI-RS resources in one set can beused as serving beam or interference beam and the UE can be requested tomeasure both beam quality by assuming both beam are serving beam andalso interference level by assuming both beam are interference beam.

The measurement method: the UE can be configured to measure the beamquality (e.g., RI, CQI and/or RSRP) of some combination of CSI-RSresources selected from different set. And in the beam quality metriccalculation, the UE can be configured to assume some CSI-RS resources asserving beam and some other CSI-RS resources as interference beams

The UE can be configured to report one or more of the followinginformation. In one example, the UE can be configured to report one ormore CSI-RS resource combinations. In each CSI-RS resource combination,there are multiple CSI-RS resources which are selected from differentsets. In one example, the UE can be configured to report someinformation to indicate in each combination, which CSI-RS resources areselected as serving beam and which CSI-RS resources are selectedinterference beams. In one example, the UE can be configured to reportthe beam quality measurement metric measured on each reported CSI-RSresource combination. The beam quality measurement metric can be RI, CQIand/or L1-RSRP.

In one embodiment, a UE can be configured with N=2 CSI-RS resource sets.A first CSI-RS set C₁ can have K₁ CSI-RS resources, for exampleC₁={c_(1,1), c_(1,2), . . . , c_(1,K) ₁ }. A second CSI-RS set C₂ canhave K₂ CSI-RS resources, for example C₂={c_(2,1), c_(2,2), . . . ,c_(2,K) ₂ }. A first CSI-RS set can be configured as serving set and asecond CSI-RS set can be configured as interference set. The UE can berequested to take any CSI-RS resource in a first CSI-RS set C₁ asserving beam or CSI measurement but take any CSI-RS resource in a secondCSO-RS set C₂ as the interference beam or interference measurement whenthe UE does beam measurement on those CSI-RS resources. And then the UEcan be requested to select one CSI-RS resource index from a first CSI-RSset C₁ and a second CSI-RS set C₂ and then report the CSI-RS resourceindex back to the gNB. The UE can be requested to report the RI, CQIand/or RSRP measured on the reported CSI-RS resources.

The UE can be requested to one or more than one of the followinginformation sets. In one example, the UE can be configured to report twoCSI-RS resource indices {c_(1,i),c_(2,j)}, where c_(1,i) is selectedfrom a first CSI-RS set C₁ and c_(2,j) is selected from a second CSI-RSset C₂. In one example, the UE can be configured to report an RI that iscalculated from the reported CSI-RS resource {c_(1,i),c_(2,j)} withusing c_(1,i) as serving beam for CSI measurement and using c_(2,j) asinterference beam for interference measurement.

The UE can first receive the configuration of two CSI-RS resource setsand the measurement setting. Then the UE can pick a first CSI-RSresource from a first set and pick a second CSI-RS resource from asecond set. The UE receives the first and second CSI-RS resources withthe same Rx-side beamforming (if the UE supports multiple Rx beam). TheUE can calculate the RI, CQI and/or RSRP by using a first CSI-RSresource as serving beam and a second CSI-RS as interference beam. TheUE can repeat this procedure on different CSI-RS resource selection. TheUE then select one or more pair of CSI-RS resources and report theselection back to the NW. The UE can calculate the RI, CQI and/or RSRPby using a first CSI-RS resource as CSI measurement and a second CSI-RSas interference measurement. The UE can repeat this procedure ondifferent CSI-RS resource selection. The UE then select one or more pairof CSI-RS resources and report the selection back to the NW.

In one embodiment, a UE can be configured with N=2 CSI-RS resource sets.A first CSI-RS set C₁ can have K₁ CSI-RS resources, for exampleC₁={c_(1,1), c_(1,2), . . . , c_(1,K) ₁ }. A second CSI-RS set C₂ canhave K₂ CSI-RS resources, for example C₂={c_(2,1), c_(2,2), . . . ,c_(2,K) ₂ }. The UE can be requested to report one or more than one ofthe following information sets.

In one example, the UE can be configured to report two CSI-RS resourceindices {c_(1,i),c_(2,j)}, where c_(1,i) is selected from a first CSI-RSset C₁ and c_(2,j) is selected from a second CSI-RS set C₂.

In one example, the UE can be configured to report a first indicator toindicate which one of {c_(1,i),c_(2,j)} is selected as interferencemeasurement and the other one is selected as CSI measurement. In otherwords, a first indicator to indicate which one of {c_(1,i),c_(2,j)} isselected as interference beam and the other one is selected as servingbeam. In one example, 1-bit field can be used to indicate that. Thevalue of 1-bit field being 0 can indicate c_(1,i) is selected asinterference measurement while the value of 1-bit field being 1 canindicate c_(2,j) is selected as interference measurement. In oneexample, 1-bit field can be used to indicate that. The value of 1-bitfield being 0 can indicate c_(1,i) is selected as interference beamwhile the value of 1-bit field being 1 can indicate c_(2,j) is selectedas interference beam.

In one example, the UE can be configured to report an RI, CQI andL1-RSRP that are calculated from the reported CSI-RS resource{c_(1,i),c_(2,j)} with the interference measurement selection indicatedby a first indicator. In other word, the beam quality metric calculatedbased on the reported CSI-RS resource {c_(1,i),c_(2,j)} with the servingbeam and interference beam indication as indicated by a first indicator

The UE can first receive the configuration of two CSI-RS resource setsand the measurement setting. Then the UE can pick a first CSI-RSresource from a first set and pick a second CSI-RS resource from asecond set. The UE receives the first and second CSI-RS resources withthe same Rx-side beamforming (if the UE supports multiple Rx beam). TheUE can calculate the RI, CQI and/or RSRP by using a first CSI-RSresource as CSI measurement and a second CSI-RS as interferencemeasurement. The UE can calculate the RI, CQI and/or RSRO by using afirst CSI-RS resource as interference measurement and a second CSI-RSresource as CSI measurement. The UE can repeat this procedure ondifferent CSI-RS resource selection. The UE then select one or more pairof CSI-RS resources and also their CSI measurement/interferencemeasurement assignment and report the selection back to the NW.

The UE can calculate the RI, CQI and/or RSRP by assuming a first CSI-RSresource as the serving beam and a second CSI-RS as interference beam.The UE can calculate the RI, CQI and/or RSRO by using a first CSI-RSresource as interference beam and a second CSI-RS resource as theserving beam. The UE can repeat this procedure on different CSI-RSresource selection. The UE then select one or more pair of CSI-RSresources and also their serving beam and interference beam assignmentand report the selection back to the NW.

In one embodiment, a UE can be configured with N=4 CSI-RS resource sets.A first CSI-RS set C₁ can have K₁ CSI-RS resources, for exampleC₁={c_(1,1), c_(1,2), . . . , c_(1,K) ₁ }. A second CSI-RS set C₂ canhave K₂ CSI-RS resources, for example C₂={c_(2,1), c_(2,2), . . . ,c_(2,K) ₂ }. A third CSI-RS set C₃ can have K₃ CSI-RS resources, forexample C₃={c_(3,1), c_(3,2), . . . , c_(3,K) ₃ }. A fourth CSI-RS setC₄ can have K₄ CSI-RS resources, for example C₄={c_(4,1), c_(4,2), . . ., c_(4,K) ₄ }.

A first set and a second set are configured as serving beam set and athird set and a fourth set are configured as interference beam set. TheUE can be requested to take any CSI-RS resource in a first CSI-RS set C₁and any CSI-RS resource in a second CSI-RS set C₂ as serving beam or CSImeasurement but take any CSI-RS resource in a third CSI-RS set C₃ andany CSI-RS resource in a fourth set C₄ as the interference beam orinterference measurement when the UE does beam measurement on thoseCSI-RS resources. And then the UE can be requested to select one CSI-RSresource index from a first CSI-RS set C₁, a second CSI-RS set C₂, athird CSI-RS set C₃, and a fourth CSI-RS set C₄ and then report thefirst, second, third, and fourth CSI-RS back to the gNB. The UE can berequested to report the RI, CQI and/or RSRP measured on the reportedCSI-RS resources. The UE can be requested to one or more than one of thefollowing information sets.

In one example, the UE can be configured to report four CSI-RS resourceindices {c_(1,i),c_(2,j),c_(3,m),c_(4,n)}, where c_(1,i) is selectedfrom a first CSI-RS set C₁ and c_(2,j) is selected from a second CSI-RSset C₂, c_(3,m) is selected from a third CSI-RS set C₃ and c_(4,n) isselected from a fourth CSI-RS set c₄.

In one example, the UE can be configured to report an RI that iscalculated from the reported CSI-RS resource{c_(1,i),c_(2,j),c_(3,m),c_(4,n)} with using c_(1,i) and c_(2,j) asserving beam for CSI measurement and using c_(3,m) and c_(4,n) asinterference beam for interference measurement.

The UE can first receive the configuration of four CSI-RS resource setsand the measurement setting. Then the UE can pick a first CSI-RSresource from a first set, a second CSI-RS resource from a second set, athird CSI-RS resource from a third set and a fourth CSI-RS resource froma fourth set. The UE receive the first, second, third, and fourth CSI-RSresources with the same Rx-side beamforming (if the UE supports multipleRx beam). The UE can calculate the RI, CQI and/or RSRP by using a firstCSI-RS resource and a second CSI-RS resource as serving beam and a thirdCSI-RS resource and a fourth CSI-RS resource as interference beam. TheUE can repeat this procedure on different CSI-RS resource selection. TheUE then select one or more combinations of CSI-RS resources and reportthe selection back to the NW. The UE can calculate the RI, CQI and/orRSRP by using a first CSI-RS resource as CSI measurement and a secondCSI-RS as interference measurement. The UE can repeat this procedure ondifferent CSI-RS resource selection. The UE then select one or morecombinations of CSI-RS resources and report the selection back to theNW.

Component 8: Non-Coherent Beam Reporting.

In some embodiment, a UE can be configured with N sets of CSI-RSresources and there can be one or multiple CSI-RS resources in each set.The UE can be measure the CSI-RS resources in those N sets and thenreport back at least one CSI-RS resource index selected from everyconfigured set. The UE can be requested to one or more beam combinationsand in each combination, there is are N CSI-RS resource indices and eachof CSI-RS resource is selected from different CSI-RS resource sets. TheUE can be requested to divide all his TXRUs or receive chains intomultiple subsets. The UE can measure the L1-RSRP of each CSI-RS resourceon each subset of TXRU or receive chain. Then the UE can be requested toselect CSI-RS resources from N sets based on the L1-RSRP measured frommultiple subsets of TXRU or receive chains.

In one embodiment, a UE can be configured with N=2 CSI-RS resource sets.A first CSI-RS set C₁ can have K₁ CSI-RS resources, for exampleC₁={c_(1,1), c_(1,2), . . . , c_(1,K) ₁ }. A second CSI-RS set C₂ canhave K₂ CSI-RS resources, for example, C₂={c_(2,1), c_(2,2), . . . ,c_(2,K) ₂ }. The UE can be requested to report one or more of thefollowing information set.

In one example, the UE can be configured to report two CSI-RS resourceindices {c_(1,i),c_(2,j)}, where c_(1,i) is selected from a first CSI-RSset C₁ and c_(2,j) is selected from a second CSI-RS set C₂.

In one example, the UE can be configured to report the L1-RSRP ofc_(1,i) measured from a first subset of UE's TXRUs or receive chains andthe L1-RSRP of c_(1,i) measured from a second subset of UE's TXRUs orreceive chains.

In one example, the UE can be configured to report the L1-RSRP ofc_(2,j) measured from a first subset of UE's TXRUs or receive chains andthe L1-RSRP of c_(2,j) measured from a second subset of UE's TXRUs orreceive chains.

In one example, the UE can be configured to report the L1-RSRPmeasurement of these two CSI-RS resources may be based on the same TRXUsubset partition or receiver chain subset partition.

In one example, the UE can be configured to report the selection ofCSI-RS resource indices {c_(1,i),c_(2,j)} may meet the condition that:the L1-RSRP of c_(1,i)—the L1-RSRP of c_(2,j) measured from a firstsubset of TXRU or receive chain is largest or larger than somethreshold; and the L1-RSRP of c_(2,j)—the L1-RSRP of c_(1,i) measuredfrom a second subset of TXRU or receive chain is largest or larger thansome threshold.

Although the present disclosure has been described with an exemplaryembodiment, various changes and modifications may be suggested to oneskilled in the art. It is intended that the present disclosure encompasssuch changes and modifications as fall within the scope of the appendedclaims.

None of the description in this application may be read as implying thatany particular element, step, or function is an essential element thatmust be included in the claims scope. The scope of patented subjectmatter is defined only by the claims. Moreover, none of the claims areintended to invoke 35 U.S.C. § 112(f) unless the exact words “means for”are followed by a participle.

What is claimed is:
 1. A user equipment (UE) for channel stateinformation (CSI) reporting in a wireless communication system, the UEcomprising: a transceiver configured to receive, from a base station(BS), configuration information for K CSI reports, wherein theconfiguration information includes resource allocation information foran uplink control information (UCI) transmission that includes UCIcomprising N UCI parts; a processor operably connected to thetransceiver, the processor configured to: calculate the K CSI reportsand partition the K CSI reports into N parts; determine an availablenumber of information bits (B1) for the UCI transmission according tothe resource allocation information; determine a required number ofinformation bits (B2) for the UCI transmission according to thecalculated K CSI reports; and determine whether the required number ofinformation bits (B2) exceeds the available number of information bits(B1), wherein the transceiver is further configured to transmit, to theBS over one slot of an uplink channel, a first part of the N UCI partsincluding a first of the N parts of the K CSI reports when the requirednumber of information bits (B2) exceeds the available number ofinformation bits (B1), wherein K and N are positive integers.
 2. The UEof claim 1, wherein N is two and K is greater or equal to one.
 3. The UEof claim 2, wherein: the processor is further configured to: partition asecond part of the N UCI parts into 2K+1 sub-parts, each of whichincludes a sub-part of a second of the N parts of the K CSI reports;allocate a priority index to each of the 2K+1 sub-parts for the UCItransmission; and determine a partial part of the second part of the NUCI parts when the required number of information bits (B2) exceeds theavailable number of information bits (B1); and the transceiver isfurther configured to transmit, to the BS over one slot of the uplinkchannel, the first part of the N UCI parts and the partial part of thesecond part of the N UCI parts, wherein the partial part of the secondpart of the N UCI parts comprises M sub-parts out of the 2K+1 sub-partsthat have a highest priority for the UCI transmission based on thepriority index, where M is a largest integer greater or equal to zeroand less than 2K+1 sub-parts, and wherein another required number ofinformation bits (B3) for a transmission of the first part of the N UCIparts and the partial part of the second part of the N UCI parts doesnot exceed the available number of information bits (B1).
 4. The UE ofclaim 3, wherein an increasing order of the priority index (0, 1, 2, . .. , 2K) corresponding to each of the 2K+1 sub-parts is mapped to adecreasing order of a priority for the UCI transmission.
 5. The UE ofclaim 3, wherein: a first part of the 2K+1 sub-parts includes widebandsecond CSI parts of the K CSI reports; a (2i)-th part of the 2K+1sub-parts includes sub-band second CSI part of even-numbered sub-bandsfor an i-th part of the K CSI reports; a (2i+1)-th part of the 2K+1sub-parts includes sub-band second CSI part of odd-numbered sub-bandsfor the i-th part of the K CSI reports; i=1, 2, . . . , K; and awideband CSI is commonly reported for all sub-bands and a sub-band CSIis reported for each of the sub-bands.
 6. The UE of claim 3, wherein:the processor is further configured to: determine symbols for a numberof information bits for the second part of the N UCI parts based on amodulation coding scheme (MCS) and a beta offset value; and determinewhether a UCI code rate associated with the symbols for the number ofinformation bits for the second part of the N UCI parts exceeds athreshold code rate (c_(T)); and the transceiver is further configuredto transmit, to the BS over one slot of the uplink channel, the firstpart of the N UCI parts and the partial part of the second part of the NUCI parts when the UCI code rate associated with the symbols for thenumber of information bits for the second part of the N UCI partsexceeds the threshold code rate (c_(T)).
 7. The UE of claim 6, whereinthe threshold code rate (c_(T)) is determined by${c_{T} = \frac{c_{MCS}}{\beta_{offset}^{{CSI} - 2}}},$ wherein c_(MCS)is a target code rate for a physical uplink shared channel (PUSCH) onoffset which the UCI transmission is performed, and wherein β_(offset)^(CSI-2) is the beta offset value for the second part of the N UCIparts.
 8. A base station (BS) for channel state information (CSI)reporting in a wireless communication system, the BS comprising: atransceiver configured to: transmit, to a user equipment (UE),configuration information for K CSI reports, wherein the configurationinformation includes resource allocation information for an uplinkcontrol information (UCI) transmission that includes UCI comprising NUCI parts; and receive, from the UE over one slot of an uplink channel,a first part of the N UCI parts including a first of N parts of K CSIreports when a required number of information bits (B2) exceeds anavailable number of information bits (B1), wherein K and N are positiveintegers, and wherein, at the UE: the K CSI reports are calculated andpartitioned into N parts; the available number of information bits (B1)for the UCI transmission according to the resource allocationinformation is determined; the required number of information bits (B2)for the UCI transmission according to the calculated K CSI reports isdetermined; and whether the required number of information bits (B2)exceeds the available number of information bits (B1) is determined. 9.The BS of claim 8, wherein N is two and K is greater or equal to one.10. The BS of claim 9, wherein the transceiver is further configured toreceive, from the UE over one slot of the uplink channel, the first partof the N UCI parts and a partial part of a second part of the N UCIparts, wherein, at the UE: the second part of the N UCI parts ispartitioned into 2K+1 sub-parts, each of which includes a sub-part of asecond of the N parts of the K CSI reports; a priority index isallocated to each of the 2K+1 sub-parts for the UCI transmission; andthe partial part of the second part of the N UCI parts is determinedwhen the required number of information bits (B2) exceeds the availablenumber of information bits (B1), wherein the partial part of the secondpart of the N UCI parts comprises M sub-parts out of 2K+1 sub-parts thathave a highest priority for the UCI transmission based on the priorityindex, wherein M is a largest integer greater or equal to zero and lessthan 2K+1 sub-parts, and wherein another required number of informationbits (B3) for a transmission of the first part of the N UCI parts andthe partial part of the second part of the N UCI parts does not exceedthe available number of information bits (B1).
 11. The BS of claim 10,wherein an increasing order of the priority index (0, 1, 2, . . . , 2K)corresponding to each of the 2K+1 sub-parts is mapped to a decreasingorder of a priority for the UCI transmission.
 12. The BS of claim 10,wherein: a first part of the 2K+1 sub-parts includes wideband second CSIparts of the K CSI reports; a (2i)-th part of the 2K+1 sub-partsincludes sub-band second CSI part of even-numbered sub-bands for an i-thpart of the K CSI reports; a (2i+1)-th part of the 2K+1 sub-partsincludes sub-band second CSI part of odd-numbered sub-bands for the i-thpart of the K CSI reports; i=1, 2, . . . , K; and a wideband CSI iscommonly reported for all sub-bands and a sub-band CSI is reported foreach of the sub-bands.
 13. The BS of claim 10, wherein the transceiveris further configured to receive, from the UE over one slot of theuplink channel, the first part of the N UCI parts and the partial partof the second part of the N UCI parts when a UCI code rate associatedwith symbols for a number of information bits for the second part of theN UCI parts exceeds a threshold code rate (c_(T)), wherein, at the UE:the symbols are determined for the number of information bits for thesecond part of the N UCI parts based on a modulation coding scheme (MCS)and a beta offset value; and whether the UCI code rate associated withthe symbols for the number of information bits for the second part ofthe N UCI parts exceeds the threshold code rate (c_(T)) is determined,the threshold code rate (c_(T)) being determined by${c_{T} = \frac{c_{MCS}}{\beta_{offset}^{{CSI} - 2}}},$ wherein C_(MCS)is a target code rate for a physical uplink shared channel (PUSCH) onwhich the UCI transmission is performed, and wherein β_(offset) ^(CSI-2)is the beta offset value for the second part of the N UCI parts.
 14. Amethod of user equipment (UE) for channel state information (CSI)reporting in a wireless communication system, the method comprising:receiving, from a base station (BS), configuration information for K CSIreports, wherein the configuration information includes resourceallocation information for an uplink control information (UCI)transmission that includes UCI comprising N UCI parts; calculating the KCSI reports and partitioning the K CSI reports into N parts; determiningan available number of information bits (B1) for the UCI transmissionaccording to the resource allocation information; determining a requirednumber of information bits (B2) for the UCI transmission according tothe calculated K CSI reports; determining whether the required number ofinformation bits (B2) exceeds the available number of information bits(B1); and transmitting, to the BS over one slot of an uplink channel, afirst part of the N UCI parts including a first of the N parts of the KCSI reports when the required number of information bits (B2) exceedsthe available number of information bits (B1), wherein K and N arepositive integers.
 15. The method of claim 14, wherein N is two and K isgreater or equal to one.
 16. The method of claim 15, further comprising:partitioning a second part of the N UCI parts into 2K+1 sub-parts, eachof which includes a sub-part of a second of the N parts of the K CSIreports; allocating a priority index to each of the 2K+1 sub-parts forthe UCI transmission; determining a partial part of the second part ofthe N UCI parts when the required number of information bits (B2)exceeds the available number of information bits (B1); and transmitting,to the BS over one slot of the uplink channel, the first part of the NUCI parts and the partial part of the second part of the N UCI parts,wherein the partial part of the second part of the N UCI parts comprisesM sub-parts out of the 2K+1 sub-parts that have a highest priority forthe UCI transmission based on the priority index, where M is a largestinteger greater or equal to zero and less than 2K+1 sub-parts, andwherein another required number of information bits (B3) for atransmission of the first part of the N UCI parts and the partial partof the second part of the N UCI parts does not exceed the availablenumber of information bits (B1).
 17. The method of claim 16, wherein anincreasing order of the priority index (0, 1, 2, . . . , 2K)corresponding to each of the 2K+1 sub-parts is mapped to a decreasingorder of a priority for the UCI transmission.
 18. The method of claim16, wherein: a first part of the 2K+1 sub-parts includes wideband secondCSI parts of the K CSI reports; a (2i)-th part of the 2K+1 sub-partsincludes sub-band second CSI part of even-numbered sub-bands for an i-thpart of the K CSI reports; a (2i+1)-th part of the 2K+1 sub-partsincludes sub-band second CSI part of odd-numbered sub-bands for the i-thpart of the K CSI reports; i=1, 2, . . . , K; and a wideband CSI iscommonly reported for all sub-bands and a sub-band CSI is reported foreach of the sub-bands.
 19. The method of claim 16, further comprising:determining symbols for a number of information bits for the second partof the N UCI parts based on a modulation coding scheme (MCS) and a betaoffset value; determining whether a UCI code rate associated with thesymbols for the number of information bits for the second part of the NUCI parts exceeds a threshold code rate (c_(T)); and transmitting, tothe BS over one slot of the uplink channel, the first part of the N UCIparts and the partial part of the second part of the N UCI parts whenthe UCI code rate associated with the symbols for the number ofinformation bits for the second part of the N UCI parts exceeds thethreshold code rate (c_(T)).
 20. The method of claim 19, wherein thethreshold code rate (c_(T)) is determined by${c_{T} = \frac{c_{MCS}}{\beta_{offset}^{{CSI} - 2}}},$ wherein c_(MCS)is a target code rate for a physical uplink shared channel (PUSCH) onwhich the UCI transmission is performed, and wherein β_(offset) ^(CSI-2)is the beta offset value for the second part of the N UCI parts.